Definitions from Wiktionary (something)

▸ adjective:  Having a characteristic that the speaker cannot specify.
▸ adverb:  (degree) Somewhat; to a degree.
▸ adverb:  (colloquial, especially in certain set combinations) Used to adverbialise a following adjective
▸ verb:  (colloquial) Designates an action whose name is forgotten by, unknown or unimportant to the user, e.g. from words of a song.
▸ noun:  An object whose nature is yet to be defined.
▸ noun:  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).

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