formerly / simultaneously, at once.

(US, slang) The police.

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.

In the time when one was of a certain age.

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

simple past tense and past participle of one-time

present participle of one-time

plural of one-time pad

(cryptography) A form of encryption where each bit or character from the plaintext is encrypted by a modular addition with a bit or character from a secret random key (or pad) of the same length as the plaintext.