productive activity, especially for the sake of economic gain.
the body of persons engaged in such activity, especially those working for wages.
this body of persons considered as a class (distinguished from management and capital ).
physical or mental work, especially of a hard or fatiguing kind; toil.
a job or task done or to be done.
the physical effort and periodic uterine contractions of childbirth.
the interval from the onset of these contractions to childbirth.
(initial capital letter) . Also called Labor Department. Informal. the Department of Labor.
verb (used without object)
to perform labor; exert one's powers of body or mind; work; toil.
to strive, as toward a goal; work hard (often followed by for ): to labor for peace.
to act, behave, or function at a disadvantage (usually followed by under ): to labor under a misapprehension.
to be in the actual process of giving birth.
to roll or pitch heavily, as a ship.
verb (used with object)
to develop or dwell on in excessive detail: Don't labor the point.
to burden or tire: to labor the reader with unnecessary detail.
British Dialect. to work or till (soil or the like).
of or pertaining to workers, their associations, or working conditions: labor reforms.
Also, especially British, labour.

1250–1300; Middle English labour < Middle French < Latin labōr- (stem of labor) work

laboringly, adverb
laborless, adjective
antilabor, adjective
nonlabor, adjective
outlabor, verb (used with object)
overlabor, verb (used with object)
prelabor, noun, verb (used without object)
prolabor, adjective
unlaboring, adjective

2. working people, working class. 4. exertion. See work. 6. parturition, delivery. 9. drudge. 14. overdo.

1, 4. idleness; leisure. 1, 4, 9. rest. Unabridged

labor omnia vincit

[lah-bohr ohm-nee-ah wing-kit; English ley-ber om-nee-uh vin-sit]
work conquers all: motto of Oklahoma. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
labor (ˈleɪbə)
vb, —n
the US spelling of labour

labour or labor (ˈleɪbə)
1.  productive work, esp physical toil done for wages
2.  a.  the people, class, or workers involved in this, esp in contrast to management, capital, etc
 b.  (as modifier): a labour dispute; labour relations
3.  a.  difficult or arduous work or effort
 b.  (in combination): labour-saving
4.  a particular job or task, esp of a difficult nature
5.  a.  the process or effort of childbirth or the time during which this takes place
 b.  (as modifier): labour pains
6.  labour of love something done for pleasure rather than gain
vb (usually foll by under)
7.  (intr) to perform labour; work
8.  (intr; foll by for, etc) to strive or work hard (for something)
9.  to be burdened (by) or be at a disadvantage (because of): to labour under a misapprehension
10.  (intr) to make one's way with difficulty
11.  (tr) to deal with or treat too persistently: to labour a point
12.  (intr) (of a woman) to be in labour
13.  (intr) (of a ship) to pitch and toss
[C13: via Old French from Latin labor; perhaps related to lābī to fall]
labor or labor
[C13: via Old French from Latin labor; perhaps related to lābī to fall]
'labouringly or labor
'laboringly or labor

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

c.1300, "exertion of the body," from O.Fr. labour (Fr. labeur), from L. laborem (nom. labor) "toil, pain, exertion, fatigue, work," perhaps originally "tottering under a burden," related to labere "to totter." The verb is c.1300, from M.Fr. labourer, from L. laborare, from labor. The verb in modern
Fr., Sp., Port. means "to plow;" the wider sense being taken by the equivalent of Eng. travail. Meaning "body of laborers considered as a class" (usually contrasted to capitalists) is from 1839. Sense of "physical exertions of childbirth" is 1595, from Fr. en travail "in (childbirth) suffering" (see travail). Labor Day first marked 1882 in New York City.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

labor la·bor (lā'bər)
The physical efforts of expulsion of the fetus and the placenta from the uterus during parturition. v. la·bored, la·bor·ing, la·bors
To undergo the efforts of childbirth.

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
Science Dictionary
labor   (lā'bər)  Pronunciation Key 
The process by which the birth of a mammal occurs, beginning with contractions of the uterus and ending with the expulsion of the fetus and the placenta.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

labor definition

The physical processes at the end of a normal pregnancy, including opening of the cervix and contractions of the uterus, that lead to the birth of the baby.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
The rehab process takes years and is extremely labor intensive.
Because it's labor-intensive, the process is also expensive.
History has proven that all sports labor conflicts are ultimately solved.
Students fighting against the use of sweatshop labor to manufacture apparel and
  other college-licensed products have a new target.
Image for labor
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