(science fiction) A chain of events in which someone or something time travels to the past as a means to fulfill their role in the history exactly as it already happened, thus implying impossibility to change the past.

plural of closed time loop

Alternative form of good-time girl

(euphemistic) A young woman who engages regularly in partying and romantic or sexual liaisons. / (euphemistic) A prostitute.

plural of game-time decision

(sports) A decision about the conduct of a sporting event, usually one made by the coach regarding which players will start or will play, or which strategy will be employed, which is put off until the start of the game itself.

Pacific Standard Time when compensating for daylight saving time.

(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.

(engineering) The predicted mean average time taken for a part or system to fail for the first time.

(idiomatic) A situation in which something must be done hurriedly, before a deadline.