资料来源 : pyDict

确切的,正确的;准确的,精确的强要,强求;急需,需要

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Exact \Ex*act"\, v. i.
   To practice exaction. [R.]

         The anemy shall not exact upon him.      --Ps. lxxxix.
                                                  22.

Exact \Ex*act"\, v. t. [imp. & p. p. {Exacted}; p. pr. & vb. n.
   {Exacting}.] [From L. exactus, p. p. of exigere; or fr. LL.
   exactare: cf. OF. exacter. See {Exact}, a.]
   To demand or require authoritatively or peremptorily, as a
   right; to enforce the payment of, or a yielding of; to compel
   to yield or to furnish; hence, to wrest, as a fee or reward
   when none is due; -- followed by from or of before the one
   subjected to exaction; as, to exact tribute, fees, obedience,
   etc., from or of some one.

         He said into them, Exact no more than that which is
         appointed you.                           --Luke. iii.
                                                  13.

         Years of servise past From grateful souls exact reward
         at last                                  --Dryden.

         My designs Exact me in another place.    --Massinger.

Exact \Ex*act"\, a. [L. exactus precise, accurate, p. p. of
   exigere to drive out, to demand, enforce, finish, determine,
   measure; ex out + agere to drive; cf. F. exact. See {Agent},
   {Act}.]
   1. Precisely agreeing with a standard, a fact, or the truth;
      perfectly conforming; neither exceeding nor falling short
      in any respect; true; correct; precise; as, the clock
      keeps exact time; he paid the exact debt; an exact copy of
      a letter; exact accounts.

            I took a great pains to make out the exact truth.
                                                  --Jowett
                                                  (Thucyd. )

   2. Habitually careful to agree with a standard, a rule, or a
      promise; accurate; methodical; punctual; as, a man exact
      in observing an appointment; in my doings I was exact. ``I
      see thou art exact of taste.'' --Milton.

   3. Precisely or definitely conceived or stated; strict.

            An exact command, Larded with many several sorts of
            reason.                               --Shak.

资料来源 : WordNet®

exact
     adj 1: marked by strict and particular and complete accordance with
            fact; "an exact mind"; "an exact copy"; "hit the exact
            center of the target" [ant: {inexact}]
     2: (of ideas, images, representations, expressions)
        characterized by perfect conformity to fact or truth ;
        strictly correct; "a precise image"; "a precise
        measurement" [syn: {accurate}, {precise}]

exact
     v 1: claim as due or just; "The bank demanded payment of the
          loan" [syn: {demand}]
     2: take as an undesirable consequence of some event or state of
        affairs; "the accident claimed three lives"; "The hard
        work took its toll on her" [syn: {claim}, {take}]