• WordNet 3.6
    • adj invalid no longer valid "the license is invalid"
    • adj invalid having no cogency or legal force "invalid reasoning","an invalid driver's license"
    • v invalid injure permanently "He was disabled in a car accident"
    • v invalid force to retire, remove from active duty, as of firemen
    • n invalid someone who is incapacitated by a chronic illness or injury
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The rickshaw was invented by the Reverend Jonathan Scobie, an American Baptist minister living in Yokohama, Japan, built the first model in 1869 in order to transport his invalid wife. Today it remains a common mode of transportation in the Orient.
    • n Invalid A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health who is unable to care for himself.
    • Invalid (Law) Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
    • a Invalid Not well; feeble; infirm; sickly; as, he had an invalid daughter.
    • Invalid Of no force, weight, or cogency; not valid; weak.
    • Invalid To classify or enroll as an invalid. "Peace coming, he was invalided on half pay."
    • Invalid To make or render invalid or infirm. "Invalided , bent, and almost blind."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: Florence Nightingale served only two years of her life as a nurse. She contracted fever during her service in the Crimean War, and spent the last 50 years of her life as an invalid.
    • invalid Not valid; of no force, weight, or cogency; weak.
    • invalid In law, having no validity or binding force; wanting efficacy; null; void: as, an invalid contract or agreement.
    • invalid Deficient in health; infirm; weak; sick.
    • n invalid An infirm or sickly person; one who is affected by disease or disabled by any infirmity.
    • n invalid Hence Something that is damaged, or the worse for wear, but not so much as to be wholly unserviceable.
    • invalid To affect with disease; render an invalid: chiefly in the past participle.
    • invalid To register as an invalid; enroll on the list of invalids in the military or naval service; give leave of absence from duty on account of ill health.
    • invalid To cause one's self to be registered as an invalid.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Invalid in-val′id without value, weight, or cogency: having no effect: void: null
    • adj Invalid deficient in health, sick, weak
    • n Invalid one who is weak: a sickly person: one disabled for active service, esp. a soldier or sailor
    • v.t Invalid to make invalid or affect with disease: to enrol on the list of invalids
    • ***


  • Benjamin Franklin
    “A cheerful face is nearly as good for an invalid as healthy weather.”
  • Irish Proverb
    Irish Proverb
    “Every invalid is a physician.”
  • Samuel Butler
    “A man's friendships are, like his will, invalidated by marriage -- but they are also no less invalidated by the marriage of his friends.”
  • Oscar Wilde
    “The modern sympathy with invalids is morbid. Illness of any kind is hardly a thing to be encouraged in others.”
  • John Updike
    “That a marriage ends is less than ideal; but all things end under heaven, and if temporality is held to be invalidating, then nothing real succeeds.”


Webster's Revised Unabridged Dictionary
Pref. in-, not + valid,: cf. F. invalide, L. invalidus, infirm, weak. Cf. Invalid infirm


In literature:

Besides, you're to be an invalid, I understand!
"The Dark Tower" by Phyllis Bottome
She moves from the door to her carriage with a languid gait, as if she might be an invalid.
"Madeline Payne, the Detective's Daughter" by Lawrence L. Lynch
You're a very spoiled invalid.
"The Rose Garden Husband" by Margaret Widdemer
She was the most considerate of invalids.
"The Atlantic Monthly, Volume 18, No. 109, November, 1866" by Various
By the fire a figure sat huddled up in a great invalid chair.
"The Slave of Silence" by Fred M. White
Mrs. Barton was an invalid, and they did not see her that evening.
"Doctor Jones' Picnic" by S. E. Chapman
And you don't look in the least like an invalid.
"The Wall Between" by Sara Ware Bassett
It was Short's duty to rise at two o'clock each morning and go to his master's room to ascertain if the invalid wanted anything.
"The Seven Secrets" by William Le Queux
Invalidism had been the cause of this change.
"The Scarlet Feather" by Houghton Townley
Then, when the invalid was so far reinstated that he was fit to be moved safely, Sally went away too, for a change.
"Somehow Good" by William de Morgan

In poetry:

One too many, one sad and unwelcome,
That reclined in his invalid's chair,
With her pale, busy fingers still knitting
Yarn mingled with sorrow and care.
"A Legend Of Buckingham Village" by Nora Pembroke
"You'll send for me when you're in need -
My name is BROWN - your life I've saved it."
"My rival!" shrieked the invalid,
And drew a mighty sword and waved it:
"Ben Allah Achmet, or, the Fatal Tum" by William Schwenck Gilbert
No more by shaded lamp, or garden fair;--
Yet hath she left a living transcript here,
Yon helpless orphans will remember her,
And the young invalid she skilled to cheer;
"Miss Laura Kingsbury," by Lydia Howard Huntley Sigourney
The choicest of fruits in profusion appeared,
On trees that he planted, and vines that he reared;
And few things delighted him more than to send,
A rare little treat to an invalid friend.
"To The Memory of David Scott" by John Henry Kimble
Yet for the fame of all these deeds
What beggar in the invalids,
With lameness broke, with blindness smitten,
Wish'd ever decently to die,
To have been either Mezeray,
Or any Monarch he has written?
"Written In The Beginning Of Mezeray's History Of France" by Matthew Prior
Thou'lt leave my hand with eager speed
The new discovered things to see--
The old pond with its water weed
And danger-daring willow tree,
Who leans an ancient invalid
Oer spots where deepest waters be.
"To Anna Three Years Old" by John Clare

In news:

Canada Top Court Declares Pfizer's Viagra Patent Invalid .
Supreme Court of Canada rules Pfizer's Viagra patent is invalid .
Invalid New Yorker's Pals Keep Life-Saving Gear Running.
Marriages of foreign gays are invalid .
A Bucks County official is under investigation for using his position to serve an invalid subpoena, county officials said Tuesday.
US Apple bounce-back patents ruled invalid .
Trek says Weagle's patents invalid .
Obama camp's ' invalid ' portrayal of Romney tax plan.
One is that it has gone unanswered by the Romney camp and the second is that it is utterly invalid .
Binghamton Hydrofracking Moratorium Ruled Invalid .
Binghamton, NY (WBNG Binghamton) A state supreme court judge has ruled the City of Binghamton's ban on hydrofracking invalid .
Lawsuit claims many speed camera tickets issued by Riverdale Park are invalid .
Birmingham City Council President Roderick Royal is among a group of citizens who have filed a lawsuit claiming that corruption invalidates at least part of the Jefferson County sewer debt.
Talaat Plunges as Madinaty Sale Recommended Invalid : Cairo Mover.
Megaupload raid warrant ' invalid ', New Zealand judge says.

In science:

If the paper self-intersects during this rotation, the simple fold is invalid.
When Can You Fold a Map?
Moreover (v ′ , v) and (v , v ′′ ) cannot both be invalid edges, therefore exactly one of them is.
An algorithm to generate exactly once every tiling with lozenges of a domain
An invalid labeling is a zero summand in the state sum.
Bi-oriented Quantum Algebras, and a Generalized Alexander Polynomial for Virtual Links
Moreover these nonanalyticities invalidate the conventionnal wisdom that ω is parametrization independant with respect to the space of coupling constants.
Critical properties of $\Phi^4_{1+1}$-theory in Light-Cone Quantization
The statistical mechanics of quadratic Hamiltonians is invalid unless the system is driven.
Coarse graining and control theory model reduction