The Collaborative International Dictionary of English v.0.48:
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.
Note: These are genuine Anglo-Saxon expressions, equivalent
to it seems to me, it seemed to me. In these
expressions me is in the dative case.
2. To employ any of the intellectual powers except that of
simple perception through the senses; to exercise the
higher intellectual faculties.
For that I am
I know, because I think. --Dryden.
(a) To call anything to mind; to remember; as, I would
have sent the books, but I did not think of it.
Well thought upon; I have it here. --Shak.
(b) To reflect upon any subject; to muse; to meditate; to
ponder; to consider; to deliberate.
And when he thought thereon, he wept. --Mark
He thought within himself, saying, What shall I
do, because I have no room where to bestow my
fruits? --Luke xii.
(c) To form an opinion by reasoning; to judge; to
conclude; to believe; as, I think it will rain
Let them marry to whom they think best. --Num.
(d) To purpose; to intend; to design; to mean.
I thought to promote thee unto great honor.
Thou thought'st to help me. --Shak.
(e) To presume; to venture.
Think not to say within yourselves, We have
Abraham to our father. --Matt. iii.
Note: To think, in a philosophical use as yet somewhat
limited, designates the higher intellectual acts, the
acts preeminently rational; to judge; to compare; to
reason. Thinking is employed by Hamilton as
"comprehending all our collective energies." It is
defined by Mansel as "the act of knowing or judging by
means of concepts,"by Lotze as "the reaction of the
mind on the material supplied by external influences."
To think better of. See under Better.
To think much of, or To think well of, to hold in esteem;
to esteem highly.
Syn: To expect; guess; cogitate; reflect; ponder;
contemplate; meditate; muse; imagine; suppose; believe.
See Expect, Guess.