'onetime' definitions:

Definition of 'onetime'

adjective

Belonging to some prior time; "erstwhile friend"; "our former glory"; "the once capital of the state"; "her quondam lover" [syn: erstwhile(a), former(a), old, onetime(a), one-time(a), quondam(a), sometime(a)]

Synonyms of 'onetime'

From: Moby Thesaurus

ancient,
bygone,
early,
erstwhile,
fore,
former,
immemorial,
late,
old,
olden,
once,
past,
prehistoric,
previous,
primeval,
primitive,
prior,
quondam,
recent,
sometime,
then,
whilom