1 [fit]
adjective, fitter, fittest.
adapted or suited; appropriate: This water isn't fit for drinking. A long-necked giraffe is fit for browsing treetops.
proper or becoming: fit behavior.
qualified or competent, as for an office or function: a fit candidate.
prepared or ready: crops fit for gathering.
in good physical condition; in good health: He's fit for the race.
being adapted to the prevailing conditions and producing offspring that survive to reproductive age.
contributing genetic information to the gene pool of the next generation.
(of a population) maintaining or increasing the group's numbers in the environment.
verb (used with object), fitted or fit, fitting.
to be adapted to or suitable for (a purpose, object, occasion, etc.).
to be proper or becoming for.
to be of the right size or shape for: The dress fitted her perfectly.
to adjust or make conform: to fit a ring to the finger.
to make qualified or competent: qualities that fit one for leadership.
to prepare: This school fits students for college.
to put with precise placement or adjustment: He fitted the picture into the frame.
to provide; furnish; equip: to fit a door with a new handle.
verb (used without object), fitted or fit, fitting.
to be suitable or proper.
to be of the right size or shape, as a garment for the wearer or any object or part for a thing to which it is applied: The shoes fit.
the manner in which a thing fits: The fit was perfect.
something that fits: The coat is a poor fit.
the process of fitting.
Verb phrases
fit out/up, to furnish with supplies, equipment, clothing, furniture, or other requisites; supply; equip: to fit out an expedition.
fit to be tied, Informal. extremely annoyed or angry: He was fit to be tied when I told him I'd wrecked the car.
fit to kill, Informal. to the limit; exceedingly: She was dressed up fit to kill.

1325–75; Middle English fitten; akin to Middle Dutch vitten to befit

fittable, adjective
unfittable, adjective

1. suitable, apt, corresponding, meet, applicable, apropos. 2. fitting, befitting. 5. healthy, hale, hardy, strong, robust.

Both fit and fitted are standard as past tense and past participle of fit1: The new door fit (or fitted) the old frame perfectly. The suit had fitted (or fit) well last year. Fitted is somewhat more common than fit in the sense “to adjust, make conform”: The tailor fitted the suit with a minimum of fuss. In the passive voice, fitted is the more common past participle: The door was fitted with a new handle. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
fit1 (fɪt)
vb , (US) fits, fitting, fitted, fit
1.  to be appropriate or suitable for (a situation, etc)
2.  to be of the correct size or shape for (a connection, container, etc)
3.  (tr) to adjust in order to render appropriate: they had to fit the idea to their philosophy
4.  (tr) to supply with that which is needed
5.  (tr) to try clothes on (someone) in order to make adjustments if necessary
6.  (tr) to make competent or ready: the experience helped to fit him for the task
7.  (tr) to locate with care
8.  (intr) to correspond with the facts or circumstances
adj , fits, fitting, fitted, fit, fitter, fittest
9.  suitable to a purpose or design; appropriate
10.  having the right qualifications; qualifying
11.  in good health
12.  worthy or deserving: a book fit to be read
13.  (foll by an infinitive) in such an extreme condition that a specified consequence is likely: she was fit to scream; you look fit to drop
14.  informal chiefly (Brit) (of a person) sexually attractive
15.  the manner in which something fits
16.  the act or process of fitting
17.  statistics See goodness of fit the correspondence between observed and predicted characteristics of a distribution or model
[C14: probably from Middle Dutch vitten; related to Old Norse fitja to knit]

fit2 (fɪt)
1.  pathol a sudden attack or convulsion, such as an epileptic seizure
2.  a sudden spell of emotion: a fit of anger
3.  an impulsive period of activity or lack of activity; mood: a fit of laziness
4.  give a person a fit to surprise a person in an outrageous manner
5.  informal have a fit, throw a fit to become very angry or excited
6.  in fits and starts, by fits and starts in spasmodic spells; irregularly
vb , fits, fitting, fitted
7.  informal (intr) to have a sudden attack or convulsion, such as an epileptic seizure
[Old English fitt conflict; see fit³]

fit3 (fɪt)
archaic a story or song or a section of a story or song
[Old English fitt; related to Old Norse fit hem, Old High German fizza yarn]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1823, "the fitting of one thing to another," later (1831) "the way something fits." Originally "an adversary of equal power" (mid-13c.), obscure, possibly from O.E. fitt "a conflict, a struggle" (see fit (n.2)). The verb meaning "be suitable" is probably from early 15c. and
likely from the adjective. Related: Fitted; fitting.

"paroxysm, sudden attack" (as of anger), 1540s, probably via M.E. sense of "painful, exciting experience," from O.E. fitt "conflict, struggle," of uncertain origin, with no clear cognates outside English. Phrase by fits and starts first attested 1610s.

"suited to the circumstances, proper," mid-15c., of unknown origin, perhaps from M.E. noun fit "an adversary of equal power" (mid-13c.), which is perhaps connected to fit (n.1). The verb meaning "to be the right shape" is first attested 1580s. Survival of the fittest (1867) coined by H. Spencer.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

fit 1 (fĭt)
v. fit·ted or fit, fit·ted, fit·ting, fits
To be the proper size and shape. adj. fit·ter, fit·test
Physically sound; healthy. n.
The degree of precision with which surfaces are adjusted or adapted to each other in a machine, device, or collection of parts.

fit 2 (fĭt)

  1. A seizure or a convulsion, especially one caused by epilepsy.

  2. The sudden appearance of a symptom such as coughing or sneezing.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Abbreviations & Acronyms
frequent international traveler
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for fittest
Thus, they emulate reproduction and survival of the fittest.
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