once

²once

noun

Definition of ONCE

: one single time : one time at least <please be on time this once>

— at once

1

: at the same time : simultaneously

2

: immediately

3

: ²both <at once funny and sad>

Examples of ONCE

1. I have tried Indian food more than once.
2. Please be on time just this once.
3. For once you seem to know what I'm talking about.

First Known Use of ONCE

13th century