(Australia, attributive) A tax avoidance scheme from the 1970s.

(historical) The followers of Hasan-i Sabbah, the Sheikh of Alamut.

(broadcasting) The closing of a radio or television station's studios and cessation of the broadcasting signal, usually overnight.

(idiomatic) To log off; to stop using a computer, radio, etc., especially to stop talking. / (broadcasting) To cease broadcasting a radio or television signal, usually at the end of a broadcasting day.

(computing, informal) An error screen displayed by some operating systems, especially Microsoft Windows, after encountering an unrecoverable error which causes the system to shut down.

present participle of offer

The act by which something is offered. / That which has been offered; a sacrifice. / An oblation or presentation made as a religious act. / A contribution given at a religious service.

worthy of being remembered mentally or in writing.

Any time so long ago that history is no longer clear, as though lost in a mist or fog.

(military) An officer who fulfills a non-combat support function, often in a headquarters or planning office.