Definition of "think" in English

verb

1. (transitive) To ponder, to go over in one's mind.

   • Idly, the detective thought what his next move should be.
   • Had we but world enough and time / This coyness, lady, were no crime. / We would sit down, and think which way / To walk, and pass our long love's day.

2. (transitive) To have (some statement) in one's mind; to say to oneself mentally.

   • "I should phone my mother," I thought.

3. (intransitive) To communicate to oneself in one's mind, to try to find a solution to a problem.

   • I thought for three hours about the problem and still couldn’t find the solution.

4. (intransitive) To conceive of something or someone [with of; or (rare) with on]

   • I tend to think of her as rather ugly.

5. (transitive) To be of opinion (that); to consider, judge, regard, or look upon (something) as.

   • I don't think it worth complaining about the leak in the roof, is it?
   • I hope you won’t think me stupid if I ask you what that means.
   • She thought it pointless starting before four o'clock.
   • I think she is pretty, contrary to most people.
   • Boxing is thought to be a dangerous sport.
   • It was thought that I was the mole in the company.
   • 1865, Henry David Thoreau, Cape Cod, Chapter IX. "The Sea and the Desert", page 182. […] one man showed me a young oak which he had transplanted from behind the town, thinking it an apple-tree.

6. (transitive) To guess; to reckon; to believe while admittedly being uncertain.

   • We should/would have thought she could've washed her hands before, at least.

7. To plan; to be considering; to be of a mind (to do something).

8. To presume; to venture.

9. (informal, used to show obviousness or agreement) Ellipsis of think so.

   • These plants are dead. Uh, you think?

noun

1. (chiefly UK) An act of thinking; consideration (of something).

   • I'll have a think about that and let you know.

verb

1. (obsolete except in methinks) To seem, to appear.