to have a conscious mind, to some extent of reasoning, remembering experiences, making rational decisions, etc.

to employ one's mind rationally and objectively in evaluating or dealing with a given situation

Think carefully before you begin.

to have a certain thing as the subject of one's thoughts

I was thinking about you. We could think of nothing else.

to call something to one's conscious mind

I couldn't think of his phone number.

to consider something as a possible action, choice, etc.

She thought about cutting her hair.

to invent or conceive of something

We thought of a new plan.

to have consideration or regard for someone

Think of others first.

to esteem a person or thing as indicated

to think badly of someone.

to have a belief or opinion as indicated

I think so.

(of a device or machine, esp. a computer) to use artificial intelligence to perform an activity analogous to human thought.

to have or form in the mind as an idea, conception, etc.

to consider for evaluation or for possible action upon

Think the deal over.

to regard as specified

He thought me unkind.

to believe to be true of someone or something

to think evil of the neighbors.

to analyze or evolve rationally

to think the problem out.

to have as a plan or intention

I thought that I would go.

to anticipate or expect

I did not think to find you here.

of or pertaining to thinking or thought.

Informal . stimulating or challenging to the intellect or mind

the think book of the year. Compare think piece

Informal . the act or a period of thinking

I want to sit down and give it a good think.

think of,

to conceive of; imagine.

to have an opinion or judgment of.

to consider; anticipate

When one thinks of what the future may bring, one is both worried and hopeful.

think out or through,

to think about until a conclusion is reached; understand or solve by thinking.

to devise by thinking; contrive

He thought out a plan for saving time.

think up, to devise or contrive by thinking

Can you think up an arrangement of furniture for this room?

think better of

to change one's mind about; reconsider

She considered emigrating to Australia, but thought better of it.

think fit

to consider advisable or appropriate

By all means, take a vacation if you think fit.

think nothing of. nothing ( def. 19 ) .

think twice

to weigh carefully before acting; consider

I would think twice before taking on such a responsibility.

verb

think