• WordNet 3.6
    • adj sure exercising or taking care great enough to bring assurance "be certain to disconnect the iron when you are through","be sure to lock the doors"
    • adj sure impossible to doubt or dispute "indisputable (or sure) proof"
    • adj sure having or feeling no doubt or uncertainty; confident and assured "felt certain of success","was sure (or certain) she had seen it","was very sure in his beliefs","sure of her friends"
    • adj sure certain to occur; destined or inevitable "he was certain to fail","his fate is certain","In this life nothing is certain but death and taxes"- Benjamin Franklin","he faced certain death","sudden but sure regret","he is sure to win"
    • adj sure reliable in operation or effect "a quick and certain remedy","a sure way to distinguish the two","wood dust is a sure sign of termites"
    • adj sure physically secure or dependable "a sure footing","was on sure ground"
    • adj sure certain not to fail "a sure hand on the throttle"
    • adj sure infallible or unfailing "a sure (or true) sign of one's commitment"
    • adj sure (of persons) worthy of trust or confidence "a sure (or trusted) friend"
    • adv sure definitely or positively (`sure' is sometimes used informally for `surely') "the results are surely encouraging","she certainly is a hard worker","it's going to be a good day for sure","they are coming, for certain","they thought he had been killed sure enough","he'll win sure as shooting","they sure smell good","sure he'll come"
    • ***

Additional illustrations & photos:

Are you sure you know what kind of cap you do want Are you sure you know what kind of cap you do want

Webster's Revised Unabridged Dictionary
  • Interesting fact: The gases emitted from a banana or an apple can help an orange ripen. (Not sure which fruits are concerned).
    • Sure Betrothed; engaged to marry. "The king was sure to Dame Elizabeth Lucy, and her husband before God.""I presume . . . that you had been sure as fast as faith could bind you, man and wife."
    • Sure Certain to find or retain; as, to be sure of game; to be sure of success; to be sure of life or health.
    • Sure Certainly knowing and believing; confident beyond doubt; implicity trusting; unquestioning; positive. "We are sure that the judgment of God is according to truth against them which commit such things.""I'm sure care 's an enemy of life."
    • Sure Fit or worthy to be depended on; certain not to fail or disappoint expectation; unfailing; strong; permanent; enduring. "His sure word.""The Lord will certainly make my lord a sure house; because my lord fighteth the battles of the Lord.""The testimony of the Lord is sure .""Which put in good sure leather sacks."
    • Sure Free from danger; safe; secure. "Fear not; the forest is not three leagues off;
      If we recover that we are sure enough."
      "She that's made sure to him she loves not well."
    • adv Sure In a sure manner; safely; certainly. "Great, sure , shall be thy meed.""'T is pleasant, sure , to see one's name in print."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The Sahara Desert is over twice as big as the second largest desert in the world, The Australian Desert. The Sahara is 3.5 million square miles compared to the 1.47 million square miles of the Australian. This is "true" in the generic sense of the Autralian Desert. There is no Australian Desert. It is divided into many different deserts. What would be true would be to say the Sahara is bigger than the desert space in Australia (which is A LOT not sure how much as a percentage of the total land mass of australia).
    • sure Confident; undoubting; having no fear of being deceived or disappointed.
    • sure Certain of one's facts, position, or the like; fully persuaded; positive.
    • sure Certain to find or retain: with of: as, to be sure of success; to be sure of life or health.
    • sure Fit or worthy to be depended on; capable of producing a desired effect or of fulfilling requisite conditions; certain not to disappoint expectation; not liable to failure, loss, or change; unfailing; firm; stable; steady; secure; infallible.
    • sure Certain to be or happen; certain.
    • sure Undoubted; genuine; true.
    • sure Out of danger; secure; safe.
    • sure Engaged to marry; betrothed.
    • sure See to be sure, below.
    • sure To make fast by betrothal; betroth.
    • sure Synonyms and Certain, Positive, etc. See confident.
    • sure Certainly; without doubt; doubtless; surely.
    • sure Firmly; securely.
    • sure To assure; make certain.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: George Washington was deathly afraid of being buried alive. After he died, he wanted to be laid out for three days just to make sure he was dead.
    • adj Sure shōōr secure: fit to be depended on; certain: strong: confident beyond doubt
    • advs Sure firmly, safely: certainly, assuredly
    • ***


  • Graham Greene
    “When we are not sure, we are alive.”
  • Jean Anouilh
    “Until the day of his death, no man can be sure of his courage.”
  • Napoleon Bonaparte
    “He who fears being conquered is sure of defeat.”
  • Seneca
    “Those that are a friend to themselves are sure to be a friend to all.”
  • H.G. Wells
    “One of the darkest evils of our world is surely the unteachable wildness of the Good.”
  • Source Unknown
    Source Unknown
    “When you laugh, be sure to laugh at what people do and not at what people are.”


Slow but sure - If something or someone is slow but sure, they may take their time to do something, but they are reliable.
Sure as eggs is eggs - These means absolutely certain, and we do say 'is' even though it is grammatically wrong.
Sure-fire - If something is sure-fire, it is certain to succeed. ('Surefire' is also used.)


Webster's Revised Unabridged Dictionary
OE. sur, OF. seür, F. sûr, L. securus,; se, aside, without + cura, care. See Secure, and cf. Assure Insure Sicker sure
Chambers's Twentieth Century Dictionary
O. Fr, seür (Fr. sûr)—L. securusse-, apart from, cura, care.


In literature:

Aunt Patty says it is as sure as sure can be.
"A Little Girl of Long Ago" by Amanda Millie Douglas
I would rather make more sure of your presence.
"The History of Sir Richard Calmady" by Lucas Malet
I am sure he is very anxious to see you.
"Cousin Henry" by Anthony Trollope
And surely there was danger that the water of that pool might find its way in beneath "Cripple Sandy's" door.
"Allison Bain" by Margaret Murray Robertson
Surely, surely, the doctor here can make you well again.
"Roger Trewinion" by Joseph Hocking
It has curtained the other vessel, spreading over her like a pall, and will surely do the same with their own.
"The Flag of Distress" by Mayne Reid
I feel sure he is, but I cannot tell.
"The Day of Judgment" by Joseph Hocking
I'm sure you'll catch cold.
"Ralph the Heir" by Anthony Trollope
I'm sure I know his handwriting.
"The Bertrams" by Anthony Trollope
His wooing was surely one of the strangest known.
"The Fighting Edge" by William MacLeod Raine
I came across two men hanging about your gate in the churchyard, and I'm not sure there wasn't a third.
"The Vicar of Bullhampton" by Anthony Trollope
Only note these few particulars, which are already sure.
"The Crown of Wild Olive" by John Ruskin
If he could be sure, then no more need he doubt; but how was he to be sure?
"The Rider of Waroona" by Firth Scott
I'm sure it's Mary's train.
"Marjorie Dean" by Pauline Lester
Sure was he of this; but what would he not have given to be as sure of her being so too!
"The Free Lances" by Mayne Reid
I am sure I cannot see what pleasure you can have in wandering through the woods alone.
"The Wild Huntress" by Mayne Reid
It is very kind of you, I'm sure.
"With Hoops of Steel" by Florence Finch Kelly
Surely it is not your own life-purpose to become a priest!
"Carmen Ariza" by Charles Francis Stocking
I don't think I had heard that before, but can't be sure.
"My Secret Life, Volumes I. to III." by Anonymous
Surely some of the stabs in store for her need not have gone to the knife-hilt.
"When Ghost Meets Ghost" by William Frend De Morgan

In poetry:

But I'll come in
Before my loss
Me farther toss,
As sure to win
Under His cross.
"A Hymn to God the Father" by Ben Jonson
Not so ungallantly surely
Wilt thou act, as not to see
One who comes to speak with thee?
"The Purgatory Of St. Patrick - Act II" by Denis Florence MacCarthy
But ah! alas! thou canst not rise,
Alas! thou canst not hear,
Or, at thy tender Father's Cries,
Thou surely wouldst appear.
"The Distress'd Father or, the Author's Tears over his Dear Daughter Rachel" by Henry Carey
Thy name, Almighty Lord,
Shall sound through distant lands;
Great is thy grace, and sure is thy word:
Thy truth forever stands.
"Hymn" by Noah Calwell W Cannon
But surely as they are, for God is truth,
And as they are not, for we saw them die,
So surely from the heaven drops light for youth,
If youth will walk thereby.
"Honours -- Part II." by Jean Ingelow
Where is he, Daya, where's this noble youth?
Do, lead me to his feet. Sure, sure you gave him
What treasures I had left you--gave him all,
Promised him more--much more?
"Nathan The Wise - Act I" by Gotthold Ephraim Lessing

In news:

The US and Egypt Sure Look Like Allies, at Least on Military Matters.
I was sure she would not miss the irony in this.
Atrium Café is a sure bet for lunch in New London.
I'm sure you understand how nice it feels to type that sentence.
Make sure you film me on my good side AFP.
He says there are some things you can do to make sure you get what you're owed.
I'm not sure I'm the last person who would ever award a duplicate medal to somebody who didn't win an event, but there are more people ahead of me on that list than there are behind me.
Well, Aaron Paul and Pierce Brosnan sure weren't.
We watch you every night on the 10pm news (and we sure missed you last week) and have a question.
Sure, I understand that we're talking about your quarterback, Drew Brees, and the art of playing "Who'll cross the street first".
The 75-80 degree temps of a month ago sure did fool us.
Sure, the top seeds are all easy to pick.
If you're going to lower the basketball hoop to dunk, make sure you don't run into it.
I didn't feel it, but we sure saw the effects in Lemoore.
"As a result of that, in the interest of making absolutely positive we protect the children, we wanted to make sure we closed down the bleacher ," Davis said.

In science:

We will see that all the functionals of the Poisson point process appearing are almost surely finite random variables.
Fluctuations of the free energy in the REM and the p-spin SK models
This surely requires some divisibility of the target group.
Classification of simple $C^*$-algebras of tracial topological rank zero
Random series (50) converges almost surely for al l |z | < 1.
SU(1,1) Random Polynomials
To prove the almost sure estimate, we follow the scheme of .
Stochastic version of the Erdos-Renyi limit theorem
Let A(N ) be a sequence of random matrices which converges in ⋆–moments to a non–commutative random variable x almost surely.
Random regularization of Brown spectral measure
Let A(N ) ∈ MN (cid:0)L∞−(Ω)(cid:1) be a sequence of random matrices such that A(N ) converges in ⋆–moments to a non–commutative random variable x almost surely.
Random regularization of Brown spectral measure
On the other hand, by Lemma 2.1, v almost surely is contained in at most one cycle of length 4.
THe largest eigenvalue of sparse random graphs
On the other hand, by Lemma 2.1, u almost surely is contained in at most one cycle of length 4.
THe largest eigenvalue of sparse random graphs
However, this correction is surely positive in the case of ∇ × ~Ωz > 0.
Activation Energy in a Quantum Hall Ferromagnet and Non-Hartree-Fock Skyrmions
Proceeding along the general lines of the proof of Proposition 3, one can show that the random set S is either almost surely infinite or almost surely finite.
Random walks in random environment: What a single trajectory tells
X (σ)} are normal or take values ± 1 If there is almost surely a ray along which inf S (σ) > −∞, then there is almost surely a ray along which lim S (σ) = +∞.
Critical RWRE on trees and tree-indexed random walks
Thus the net conductance from ρ′ to ∂Γ vanishes almost surely, so the RWRE is almost surely recurrent.
Critical RWRE on trees and tree-indexed random walks
So M∞ < ∞ almost surely, which clearly yields that log W∞ > −∞ almost surely.
On the Brownian directed polymer in a Gaussian random environment
We want to show that Ui almost surely vanishes, or equivalently that the image of r almost surely takes Wi to a complementary subspace.
Finite covers of random 3-manifolds
Lemma 3.4 If the random chain recurrent variable x(ω ) ∈ U (ω ) P-almost surely, where U (ω ) is a random pre-attractor, then we have x(ω ) ∈ A(ω ) P-almost surely, where A(ω ) is the attractor determined by U (ω ).
The random case of Conley's theorem