0 an object, situation, quality, or action that is not exactly known or stated: --
We were given five hundred pounds in compensation which isn't much but at least it's something.
There's just something strange about him.
Don't just stand there, do something.
Is there something you'd like to say?
Something's happened to upset him but we don't know what it is.
There's something wrong with the engine - it's making strange noises.
We thought there was something wrong because we hadn't heard from you.
1 used after a number like 20, 30, etc. to refer to the age of a person who is between 20 and 29, 30 and 39 years old, etc., or to a person who is of this age: --