What is the meaning of Something?

An uncertain or unspecified thing; one thing.

A quality to a moderate degree.

A talent or quality that is difficult to specify.

Somebody who or something that is superlative or notable in some way.

Having a characteristic that the speaker cannot specify.

Somewhat; to a degree.

Used to adverbialise a following adjective

Designates an action whose name is forgotten by, unknown or unimportant to the user, e.g. from words of a song.

An object whose nature is yet to be defined.

An object whose name is forgotten by, unknown or unimportant to the user, e.g., from words of a song. Also used to refer to an object earlier indefinitely referred to as 'something' (pronoun sense).

Source: wiktionary.org