Meaning of “something” - Learner’s Dictionary

something

pronoun uk us /ˈsʌmθɪŋ/

A1 used to refer to a thing when you do not know what it is or when it is not important what it is:

As soon as I walked in, I noticed that something was missing.
We know about the problem and we're trying to do something about it.
It's not something that will be easy to change.
There's something else (= another thing) I wanted to tell you.
or something (like that)

A2 used to show that what you have just said is only an example or you are not certain about it:

Why don't you go to a movie or something?
something like

similar to or approximately:

He paid something like $2000 for his car.
be something informal

to be a thing which is important, special, or useful:

The President visiting our hotel - that would really be something.
It's not much but it's something (= better than nothing).
something of a sth

used to describe a person or thing in a way which is partly true but not completely or exactly:

It came as something of a surprise.
He has a reputation as something of a troublemaker.
be/have something to do with sth/sb

to be related to something or a cause of something but not in a way which you know about or understand exactly:

It might have something to do with the way it's made.

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