once

Từ điển WordNet v3.1 - WordNet Dictionary

adverb

1. on one occasion (Freq. 98)
- once I ran into her
• Syn:
one time, in one case
2. as soon as (Freq. 28)
- once we are home, we can rest
3. at a previous time (Freq. 21)
- at one time he loved her
- her erstwhile writing
- she was a dancer once
• Syn:
formerly, at one time, erstwhile, erst

• Từ đồng nghĩa / Synonyms:
  formerly, at one time, erstwhile, erst, one time, in one case