Death supposedly caused by staying overnight in a closed room in which an electric fan is operating. It is a South Korean urban legend.

plural of winnowing fan

(geology) A shallow marine sediment beyond the opening of a large river etc.

plural of fan fiction

(idiomatic, intransitive) To have a dramatic, usually negative, effect.

plural of fan palm

Any of several different kinds of palms (Arecaceae) in various genera with leaves that are palmately lobed (rather than pinnately compound).

plural of sea fan

Any gorgonian which branches in a fan-like form, especially Gorgonia flabellum of Florida and the West Indies.

plural of hand fan