Meaning of “think” - Learner’s Dictionary

think

verb uk us /θɪŋk/ (past tense and past participle thought)
OPINION [ I, T ]

A1 to have an opinion about something or someone:

Do you think it's going to rain?
[ + (that) ] I don't think that Emma will get the job (= I believe she will not get it).
What did you think of the film?
What do you think about modern art?
CONSIDER [ I ]

B1 to consider an idea or a problem:

He thought for a few seconds before answering.
You should think about where you want to live.
EXPECT [ I, T ]

A1 to believe that something is true, or to expect that something will happen, although you are not sure:

I think she's called Joanna.
"Does this train stop at Oxford?" "Yes, I think so."
[ + (that) ] I never thought that I would see Steven again.
think about/of doing sth

A2 to consider doing something:

I'm thinking of moving to Sydney.
We thought about getting married, but decided not to.
think about/of sb/sth

B1 to use your mind to imagine a situation:

I'm sorry I can't be at the wedding, but I'll be thinking of you.
think of sth

B1 to use your imagination and intelligence to produce an idea, a solution to a problem, or an answer to a question:

When did you first think of the idea?
I need to think of a suitable response to this letter.
think a lot of sb/sth

A1 to admire someone, or to believe that something is good quality:

Simon thinks a lot of you, you know.
not think much of sb/sth

A1 to not like someone, or to believe that something is not good quality:

I don't think much of the food here.
I think

used to introduce a suggestion or explanation in order to be polite:

[ + (that) ] It's getting late - I think that we should go.
Who would have thought...?

used to express how surprising something is:

[ + (that) ] Who would have thought that buying a house could take so long!
→ See also think the world of sb

(Definition of “think verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)