From The Collaborative International Dictionary of English v.0.44 [gcide]:
Precise \Pre*cise"\, adjective [L. praecisus cut off, brief, concise, p. p. of praecidere to cut off in front, to cut off; prae before + caedere to cut: cf. F. pr['e]cis. Cf. {Concise}.]
1. Having determinate limitations; exactly or sharply defined or stated; definite; exact; nice; not vague or equivocal; as, precise rules of morality.
The law in this point is not precise. --Bacon.
For the hour precise Exacts our parting hence. --Milton.
2. Strictly adhering or conforming to rule; very nice or exact; punctilious in conduct or ceremony; formal; ceremonious. --Addison.
He was ever precise in promise-keeping. --Shak.
Syn: Accurate; exact; definite; correct; scrupulous; punctilious; particular; nice; formal. See {Accurate}. -- {Pre*cise"ly}, adverb -- {Pre*cise"ness}, noun
From WordNet (r) 2.0 [wn]:
adjective
1: sharply exact or accurate or delimited; "a precise mind"; "specified a precise amount"; "arrived at the precise moment" [ant: {imprecise}]
2: (of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct; "a precise image"; "a precise measurement" [syn: {accurate}, {exact}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
150 Moby Thesaurus words for "precise": absolute, accurate, appreciative, attentive, authentic, be precise, careful, censorious, certain, choicy, choosy, circumscribed, close, concrete, conscientious, constant, correct, critical, defined, definite, delicate, demanding, descend to particulars, detail, detailed, determinate, different, differential, direct, discriminate, discriminating, discriminative, distinct, distinctive, distinguished, distinguishing, esoteric, especial, even, exact, exacting, exceptional, exigent, explicit, express, exquisite, extraordinary, faithful, fastidious, fine, finical, finicking, finicky, fixed, full, fussy, genteel, individual, individualize, inerrable, inerrant, infallible, inflexible, inner, intimate, itemize, limited, literal, literatim, make precise, mathematical, methodical, meticulous, micrometrically precise, microscopic, minute, narrow, nice, noteworthy, orderly, particular, particularize, peculiarize, perfect, perfectionistic, personal, personalize, picayune, picky, pinpoint, precious, precisian, precisianistic, precisionist, precisionistic, prig, priggish, prim, prissy, private, proper, prudish, punctilious, punctual, puristic, puritanic, puritanical, refined, religious, religiously exact, respective, restricted, right, rigid, rigorous, scientific, scientifically exact, scrupulous, scrutinizing, selective, sensitive, several, severe, singular, solipsistic, special, specialize, specific, spell out, square, straitlaced, strict, stringent, stuffy, subtle, tactful, true, truthful, unambiguous, unbending, unconditional, undeviating, unequivocal, unerring, unyielding, veracious, verbatim, very, well-defined, word-for-word