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2 : FOLLOWER

ac·o·nite noun 1 : MONKSHOOD

2 : a drug obtained from a common Old World monkshood

acorn noun : the nut of the oak

acorn squash noun : an acorn-shaped dark green winter squash with a ridged surface

acous·tic or acous·ti·cal adjective 1 : of or relating to the sense or organs of hearing, to sound, or to the science of sounds

2 : deadening sound <~ tile>

3 : operated by or utilizing sound waves

— acous·ti·cal·ly adverb

Synonyms

auditory, aural, auricular—more at AUDITORY

acous·tics noun singular or plural 1 : the science of sound

2 : the qualities in a room that make it easy or hard for a person in it to hear distinctly

ac·quaint verb [ORIGIN: ME, ultim. fr. L ad- + cognoscere to know]

1 : to cause to know personally

2 : to make familiar : to cause to know firsthand

Synonyms

[1, 2] apprise, brief, clue, familiarize, fill in, inform, initiate, introduce, orient

ac·quain·tance noun 1 : personal knowledge

2 : a person with whom one is acquainted

— ac·quain·tance·ship noun

Synonyms

cognizance, familiarity; also association, experience, exposure, intimacy, involvement

Antonyms

unfamiliarity

ac·qui·esce verb -esced; -esc·ing : to accept, comply, or submit without open opposition

— ac·qui·es·cence noun

— ac·qui·es·cent·ly adverb

ac·qui·es·cent adjective : inclined to acquiesce

Synonyms

passive, resigned, tolerant, unresistant, unresisting, yielding—more at PASSIVE

ac·quire verb ac·quired; ac·quir·ing : to gain possession of

Synonyms

cultivate, develop, form—more at DEVELOP

attain, capture, carry, draw, earn, gain, garner, get, land, make, obtain, procure, realize, secure, win—more at EARN

ac·quir·able adjective : capable of being acquired

Synonyms

accessible, attainable, available, obtainable, procurable—more at AVAILABLE

ac·quired adjective 1 : gained by or as a result of effort or experience

2 : caused by environmental forces and not passed from parent to offspring in the genes <~ characteristics>

acquired immune deficiency syndrome noun : AIDS

acquired immunodeficiency syndrome noun : AIDS

ac·quire·ment noun 1 : ATTAINMENT, ACCOMPLISHMENT

2 : the act of acquiring

ac·qui·si·tion noun 1 : ACQUIREMENT

2 : something acquired

ac·quis·i·tive adjective : eager to acquire : GREEDY

— ac·quis·i·tive·ly adverb

Synonyms

avaricious, avid, covetous, grasping, greedy, mercenary, rapacious—more at GREEDY

ac·quis·i·tive·ness noun : the quality or state of being acquisitive

Synonyms

avarice, avidity, covetousness, cupidity, greed, rapaciousness—more at GREED

ac·quit verb ac·quit·ted; ac·quit·ting 1 : to pronounce not guilty

2 : to conduct (oneself) usu. satisfactorily

— ac·quit·tal noun

Synonyms

[1] absolve, clear, exculpate, exonerate, vindicate—more at EXCULPATE

[2] bear, behave, comport, conduct, demean, deport, quit—more at BEHAVE

acre noun 1 plural : an area of land under individual ownership : ESTATE

2 : a unit of land measure equal to 43,560 square feet

acre·age noun : area in acres

ac·rid adjective 1 : sharp and biting in taste or odor

2 : deeply bitter : CAUSTIC

— acrid·i·ty noun

— ac·rid·ly adverb

Synonyms

acrimonious, bitter, hard, rancorous, resentful, sore—more at BITTER

biting, caustic, cutting, mordant, sarcastic, satiric, scathing, sharp—more at SARCASTIC

ac·rid·ness noun : the quality or state of being acrid

ac·ri·mo·ny noun, plural -nies : harsh or biting sharpness esp. of words, manner, or disposition

— ac·ri·mo·ni·ous·ly adverb

Synonyms

acidity, asperity, bitterness, cattiness, tartness, virulence, vitriol; also harshness, hostility, relentlessness, severity, sternness, vehemence

ac·ri·mo·ni·ous adjective : caustic, biting, or rancorous esp. in feeling, language, or manner

Synonyms

acrid, bitter, hard, rancorous, resentful, sore—more at BITTER

ac·ri·mo·ni·ous·ness noun : the quality or state of being acrimonious

ac·ro·bat noun [ORIGIN: F acrobate, fr. Gk akrobat