once
1. [ adverb ] on one occasion
Synonyms: in_one_case one_time
Examples:

"once I ran into her"

2. [ adverb ] as soon as
Synonyms: when
Examples:

"once we are home, we can rest"

3. [ adverb ] at a previous time
Synonyms: formerly erstwhile erst at_one_time
Examples:

"once he loved her" "her erstwhile writing"

4. [ adjective ] belonging to some prior time
Synonyms: former onetime quondam sometime erstwhile
Examples:

"erstwhile friend" "our former glory" "the once capital of the state" "her quondam lover"

Related terms: past
Similar spelling:   onega
  one_C
  on-key
  Ong
  ounce
  onyx
  onus