formerly
Definitions
In time past; at a previous time.
In a former role, position, or state.
Examples
The building was formerly used as a public library before being converted into apartments.
She is formerly a professional athlete who now works as a sports commentator.
The city, formerly known as St. Petersburg, was renamed during the revolution.
Synonyms
previously once erstwhile before heretofore already sometime
Antonyms
currently now presently hereafter subsequently later henceforth