Some unspecified or indeterminate thing (material or immaterial).

Some person, somebody. someone else, used pregnantly to mean ‘a rival for the affections’. Cf. somebody else pron. at somebody, n. 1b(a).

a thing (without qualifying word or expression): (in indefinite sense) anything, something. Now rare (chiefly regional in later use).

A person unknown, indeterminate, or unnamed; someone, some person.

= something, n. (in various senses).