(video games, of an Xbox 360 games console) To suffer a general hardware fault, the red ring of death.

Calidris canutus, a species of wading bird.

A medium-sized bird, Lagopus lagopus scotica, of the grouse family, found in heather moorland in Great Britain and Ireland.

(Britain, birdwatching) The red-throated diver.

A supposed substance for use in the creation of nuclear bombs and other weapons, about which there are various conspiracy theories.

(idiomatic, aviation, military) A hotshot fighter pilot; an ace fighter pilot.

(Canada, slang) Any of the red-painted electrical streetcars and subway trams operated by the Toronto Transit Commission in Toronto, Canada, especially the classic models used during the early and mid-20th century.

(marketing) A week that is in high demand because it is in a holiday high season. Especially used in time-share, but not limited to this industry.

plural of red dwarf

plural of red squirrel