Source : Webster's Revised Unabridged Dictionary (1913)

Think \Think\, n.
   Act of thinking; a thought. [Obs. or Colloq.]

Think \Think\, v. t.
   1. To conceive; to imagine.

            Charity . . . thinketh no evil.       --1 Cor. xiii.
                                                  4,5.

   2. To plan or design; to plot; to compass. [Obs.]

            So little womanhood And natural goodness, as to
            think the death Of her own son.       --Beau. & Fl.

   3. To believe; to consider; to esteem.

            Nor think superfluous other's aid.    --Milton.

   {To think much}, to esteem a great matter; to grudge. [Obs.]
      ``[He] thought not much to clothe his enemies.'' --Milton.

   {To think scorn}.
      (a) To disdain. [Obs.] ``He thought scorn to lay hands on
          Mordecai alone.'' --Esther iii. 6.
      (b) To feel indignation. [Obs.]

Think \Think\, v. t. [imp. & p. p. {Thought}; p. pr. & vb. n.
   {Thinking}.] [OE. thinken, properly, to seem, from AS.
   [thorn]yncean (cf. {Methinks}), but confounded with OE.
   thenken to think, fr. AS. [thorn]encean (imp.
   [thorn][=o]hte); akin to D. denken, dunken, OS. thenkian,
   thunkian, G. denken, d["u]nken, Icel. [thorn]ekkja to
   perceive, to know, [thorn]ykkja to seem, Goth. [thorn]agkjan,
   [thorn]aggkjan, to think, [thorn]ygkjan to think, to seem,
   OL. tongere to know. Cf. {Thank}, {Thought}.]
   1. To seem or appear; -- used chiefly in the expressions
      methinketh or methinks, and methought.

Source : WordNet®

think
     n : an instance of deliberate thinking; "I need to give it a
         good think"
     [also: {thought}]

think
     v 1: judge or regard; look upon; judge; "I think he is very
          smart"; "I believe her to be very smart"; "I think that
          he is her boyfriend"; "The racist conceives such people
          to be inferior" [syn: {believe}, {consider}, {conceive}]
     2: expect, believe, or suppose; "I imagine she earned a lot of
        money with her new novel"; "I thought to find her in a bad
        state"; "he didn't think to find her in the kitchen"; "I
        guess she is angry at me for standing her up" [syn: {opine},
         {suppose}, {imagine}, {reckon}, {guess}]
     3: use or exercise the mind or one's power of reason in order
        to make inferences, decisions, or arrive at a solution or
        judgments; "I've been thinking all day and getting
        nowhere" [syn: {cogitate}, {cerebrate}]
     4: recall knowledge from memory; have a recollection; "I can't
        remember saying any such thing"; "I can't think what her
        last name was"; "can you remember her phone number?"; "Do
        you remember that he once loved you?"; "call up memories"
        [syn: {remember}, {retrieve}, {recall}, {call back}, {call
        up}, {recollect}] [ant: {forget}]
     5: imagine or visualize; "Just think--you could be rich one
        day!"; "Think what a scene it must have been!"
     6: focus one's attention on a certain state; "Think big";
        "think thin"
     7: have in mind as a purpose; "I mean no harm"; "I only meant
        to help you"; "She didn't think to harm me"; "We thought
        to return early that night" [syn: {intend}, {mean}]
     8: decide by pondering, reasoning, or reflecting; "Can you
        think what to do next?"
     9: ponder; reflect on, or reason about; "Think the matter
        through"; "Think how hard life in Russia must be these
        days"
     10: dispose the mind in a certain way; "Do you really think so?"
     11: have or formulate in the mind; "think good thoughts"
     12: be capable of conscious thought; "Man is the only creature
         that thinks"
     13: bring into a given condition by mental preoccupation; "She
         thought herself into a state of panic over the final
         exam"
     [also: {thought}]