1. (

• once ,
• one_time ,
• in_one_case

) on one occasion; "once I ran into her" ;

2. (

• once ,

) as soon as; "once we are home, we can rest" ;

3. (

• once ,
• formerly ,
• at_one_time ,
• erstwhile ,
• erst

) at a previous time; "at one time he loved her"; "her erstwhile writing"; "she was a dancer once" ;