• WordNet 3.6
    • adj eighteen being one more than seventeen
    • n eighteen the cardinal number that is the sum of seventeen and one
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: On average, the life span of an American dollar bill is eighteen months
    • Eighteen A symbol denoting eighteen units, as 18 or xviii.
    • a Eighteen ā"tēn` Eight and ten; as, eighteen pounds.
    • Eighteen The number greater by a unit than seventeen; eighteen units or objects.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The first human heart transplant happened on December 3, 1967. Unfortunately the patient only lived for eighteen days, succumbing in the end to pneumonia
    • eighteen Eight more than ten, or one more than seventeen: a cardinal numeral.
    • n eighteen The sum of ten and eight, or seventeen and one.
    • n eighteen A symbol representing eighteen units, as 18, or XVIII, or xviii.
    • ***


  • Andre Malraux
    Andre Malraux
    “Between eighteen and twenty, life is like an exchange where one buys stocks, not with money, but with actions. Most men buy nothing.”
  • Mark Twain
    “Life would be infinitely happier if we could only be born at the age of eighty and gradually approach eighteen.”
  • Source Unknown
    Source Unknown
    “At eighteen our convictions are hills from which we look; at forty-five they are caves in which we hide.”
  • Albert Einstein
    “Common sense is the collection of prejudices acquired by age eighteen.”
  • Lee Trevino
    Lee Trevino
    “My divorce came to me as a complete surprise. That's what happens when you haven't been home in eighteen years.”
  • Source Unknown
    Source Unknown
    “Eighteen might look at thirty-four through a rising mist of adolescence; but twenty-two would see thirty-eight with discerning clarity.”


Webster's Revised Unabridged Dictionary
AS. eahtatȳne, eahtatēne,. See Eight, and Ten, and cf. Eighty


In literature:

He arrived at the mouth of the Saguenay on the 26th of April, after a remarkably short passage of eighteen days.
"The Rise of Canada, from Barbarism to Wealth and Civilisation" by Charles Roger
He was nearly eighteen, was "man grown," strong as a lion, and agile as a deer.
"Freaks of Fortune" by Oliver Optic
It was eighteen years since he had asked it for the first time, and two years since the last.
"Lucy Maud Montgomery Short Stories, 1909 to 1922" by Lucy Maud Montgomery
The crossing was made with such favourable weather, that only eighteen days were needed to reach the Portuguese Colony.
"Celebrated Travels and Travellers" by Jules Verne
The subject had given him no rest for eighteen years.
"Great Men and Famous Women. Vol. 3 of 8" by Various
This adventure came to grief in a year, and then Henry, at the age of eighteen, married Miss Shelton, the daughter of a neighboring farmer.
"Great Men and Famous Women. Vol. 4 of 8" by Various
After this time, the whole little church, eighteen in number, unanimously gave me an invitation to become their pastor.
"The Life of Trust: Being a Narrative of the Lord's Dealings With George Müller" by George Müller
No fewer than eighteen convents were still standing in 1873.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3" by Various
Miss L. a young lady about eighteen, had tried variety of advice for pimples over the greatest part of her face in vain.
"Zoonomia, Vol. II" by Erasmus Darwin
The bull-ring of the capital will seat eighteen thousand spectators.
"Foot-prints of Travel" by Maturin M. Ballou
But the Jewish people had set this example eighteen centuries before.
"History of Education" by Levi Seeley
He admitted that he had lost eighteen thousand men.
"Critical and Historical Essays, Volume III (of 3)" by Thomas Babington Macaulay
He was full eighteen minutes and a half behind his time.
"A Budget of Christmas Tales by Charles Dickens and Others" by Various
Number of machines in a squadron raised to eighteen in 1916.
"The War in the Air; Vol. 1" by Walter Raleigh
I was eighteen again with a lot besides that I didn't have at eighteen.
"One Way Out" by William Carleton
From this town there is a regular ferry to Norfolk, across Hampton Roads, eighteen miles over.
"Travels in North America, From Modern Writers" by William Bingley
And I can get her a first-class place as a parlor maid where she can have eighteen dollars a month, which I couldn't afford to pay.
"A Modern Cinderella" by Amanda M. Douglas
Londoners had known and drunk coffee for eighteen years before Dorothy Jones got her coffee license.
"All About Coffee" by William H. Ukers
Eighteen years old when enlisted.
"Company K, Twentieth Regiment, Illinois Volunteer Infantry" by Andrew Brown
Eighteen men from the centre section were sent to Hampton Roads in a small boat, in the afternoon, to unload the battery from the Novelty.
"Diary of Battery A, First Regiment Rhode Island Light Artillery" by Theodore Reichardt

In poetry:

Schoolgirls we, eighteen and under,
From scholastic trammels free,
And we wonder - how we wonder! -
What on earth the world can be!
"Speculation" by William Schwenck Gilbert
Eighteen hundred and eighty-two,
Pass along; we have done with you.
Your record is sealed and laid away,
Not to be opened till Judgment-day.
"New Year's Musings" by Alfred Gibbs Campbell
'Tis eighteen hundred years and more
Since those sweet oracles were dumb;
We wait for Him, like them of yore;
Alas, He seems so slow to come!
"A Christmas Carol" by James Russell Lowell
One fine morning, the fifth of July,
The summer flowers were in bloom,
Eighteen seventy-one, little Hattie died,
And is sleeping in her tomb.
"Hattie House" by Julia A Moore
And the Players are bought and sold —like tripe
—Imagine the cruel suspense —
When I was put up for auction
And I didn't fetch eighteen pence !
"One Over The Eight (Football Score!)" by T W Connor
These splendors passed, at length I near
The church steps with the goats and sheep;
A goodly flock! prepared to hear
The tale that eighteen centuries weep.
"A Winter Walk" by John Albee

In news:

In just the past eighteen months, thirteen states have passed laws that require voters to show ID.
Eighteen people were forced out of their residences when a fire erupted at their South Knoxville apartment building.
Eighteen states permit medicinal marijuana.
Eighteen stories, 476,000 square feet, due to open in 2014, and no commitments from tenants.
Eighteen children are reportedly among the dead.
The Birmingham News Eighteen adult pit bulls and two puppies are evaluated and cared for at the BJC Animal Control Services in Birmingham, Al.
Eighteen Orange County prep basketball teams will be at Ocean View High Saturday for the Coaches for a Cause extravaganza.
Building an uplifting modernist statement over an auto-repair shop only took eighteen months.
When Ignatius Murray turned eighteen, his father went to the official registry of Westmoreland Parish in southwestern Jamaica and signed over the leases on the twenty-acre family farm to his son.
Eighteen cases of Shigellosis have been reported in the county since Sept 20.
"Well, I have eighteen boxes of Shreddies.".
Eighteen-year-old Sara isn't a party girl, but she plays one on TV.
The couple, who were married for ten months and have an eighteen-month old daughter named Shayla, are at odds regarding the amount Norma should walk away with.
You must be at least eighteen (18) years old and a legal resident of Kentucky and Indiana at the time of entry to win.
Eighteen companies from last year's list chose not to participate, including Prineville's Les Schwab Tire Centers, which ranked No.

In science:

The single-cell cavities operate at 4.5 K and are housed in eighteen 3.5 m long cryomodules.
ILC Reference Design Report Volume 1 - Executive Summary
Eighteen 43 GHz SiO maser sources were detected.
ATCA Detection of SiO Masers in the Inner Parsecs of the Galactic Center
It is instructive to apply the face shape notation to some of the eighteen finite geometrically regular polyhedra (the regular polyhedra of index 1).
Regular Polyhedra of Index Two, I
FIG. 8: (Color online) The 5-year Impact Factors and Article Influence Scores of eighteen journals in our dataset.
Quantifying the influence of scientists and their publications: Distinguish prestige from popularity
The eighteen selected journals are ranked in descending order by their AIS.
Quantifying the influence of scientists and their publications: Distinguish prestige from popularity
The top category, “Renowned papers” are those with 500 or more citations. Let us have a look at the citations to roughly eighteen and a half thousand papers5, published in Physical Review D in 1975-1994 .
Theory of citing
The exact value of the Bayes factor of Model 2 over Model 1 is given in Table 2 along with the Laplace approximation to this and mean and standard deviation of the estimate computed over eighteen runs of the Monte Carlo and nested sampling algorithms.
Estimating the evidence -- a review
Figure 1: Boxplots of evidence models 1 & 2 (left and middle panel) and computed Bayes factors (right panel) over eighteen runs of the algorithms of Section 3.
Estimating the evidence -- a review
Table 2: Comparison of different approaches to estimating the Bayes factor of Model 2 over Model 1 based on eighteen runs of each algorithm for the Radiata Pine data.
Estimating the evidence -- a review
This is surprising, because I pointed out this oversight to him in a private correspondence more than eighteen months ago.
Whither All the Scope and Generality of Bell's Theorem?
The locations and durations of eighteen bursts were taken from the 3B catalog and the data of thirteen bursts have been transmitted to us by the BACODINE facility.
Search for TeV Counterparts of Gamma-Ray Bursts with the HEGRA Experiment
This proof contains eighteen yes-no questions about a four-dimensional physical system, combined in nine mutually incompatible tests.
Kochen-Specker theorem and experimental test on hidden variables
The smallest proof of the KS theorem currently known contains eighteen pro jection operators (yes-no questions) which can be combined in nine resolutions of the identity (maximal tests) of a fourdimensional Hilbert space, H4 [7,8].
Kochen-Specker theorem and experimental test on hidden variables
Over the last thirty years the state-of-art format size of array sensors has been doubling approximately every eighteen months.
Does the Lunar Surface Still Offer Value As a Site for Astronomical Observatories?
In simple terms, every eighteen months a telescope with a fixed focal plane instrument becomes half as capable as a new replacement would be.
Does the Lunar Surface Still Offer Value As a Site for Astronomical Observatories?