Third-person singular simple present indicative form of one-time

Of or pertaining to a specific time in the past. / Occurring or used in a single instance and then never again.

(soccer, ice hockey) To shoot (the ball or puck) directly from a teammate's pass.

(US, slang) The police.

formerly / simultaneously, at once.

In the time when one was of a certain age.

present participle of one-time

simple past tense and past participle of one-time

(idiomatic) In advance of concurrent commonly accepted ideas; showing characteristics of changes yet to be; present in one's work before later advances in the field.

(intransitive, idiomatic) To go about something slowly and carefully or at one's own pace. / (intransitive, idiomatic) To take more time to do something than is considered acceptable.