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WordNet-OnlineFree dictionary and thesaurus of English. Definitions, synonyms, antonyms and more...
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Noun effort has 4 senses
attempt, effort, endeavor, endeavour, try - earnest and conscientious activity intended to do or accomplish something; "made an effort to cover all the reading material"; "wished him luck in his endeavor"; "she gave it a good try"--1 is a kind of activity
 --1 has particulars:
 |  | batting; best; worst; bid, play; braving, confronting, coping with, grappling, tackling; crack, fling, go, pass, whirl, offer; essay; foray; contribution, part, share; liberation; mug's game; power play, squeeze play, squeeze; research effort; seeking; shot, stab; shot; striving, nisus, pains, strain; struggle, battle; takeover attempt; test, trial, run; test, trial | 
effort, elbow grease, exertion, travail, sweat - use of physical or mental energy; hard work; "he got an A for effort"; "they managed only with great exertion"--2 is a kind of labor, labour, toil
 --2 has particulars:
 |  | struggle; trouble, difficulty; least effort, least resistance; strain, straining; exercise, exercising, physical exercise, physical exertion, workout; pull; application, diligence; overkill; supererogation; overexertion; friction, detrition, rubbing | 
campaign, cause, crusade, drive, movement, effort - a series of actions advancing a principle or tending toward a particular end; "he supported populist campaigns"; "they worked in the cause of world peace"; "the team was ready for a drive toward the pennant"; "the movement to end slavery"; "contributed to the war effort"--3 is a kind of venture
 --3 has particulars:
 |  | advertising campaign, ad campaign, ad blitz; anti-war movement; consumerism; campaigning, candidacy, candidature, electioneering, political campaign; ecumenical movement; fund-raising campaign, fund-raising drive, fund-raising effort; feminist movement, feminism, women's liberation movement, women's lib; gay liberation movement, gay lib; lost cause; reform; war; youth movement, youth crusade | 
deed, feat, effort, exploit - a notable achievement; "he performed a great deed"; "the book was her finest effort"--4 is a kind of accomplishment, achievement
 --4 has particulars:
 |  | acquiring, getting; causing, causation; delivery, obstetrical delivery; departure, going, going away, leaving; derring-do; discovery, find, uncovering; disposal, disposition; hit; implementation, effectuation; egress, egression, emergence; equalization, equalisation, leveling; exhumation, disinterment, digging up; mitzvah, mitsvah; propulsion, actuation; rally, rallying; recovery, retrieval; running away; stunt; touch, touching; tour de force | 
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