Turn, a change of the direction of a movement or a change in orientation, and it is often also used in a metaphorical sense, contrary to straight

Turn (Indian band), an Indian rock band based in Delhi

Turn (music), a sequence of several notes next to each other in the scale

Turn[1], a Californian rock band based in Monterey County

Turn, a verb meaning to spoil or go off

Tern, a seabird in the family Sternidae

Turn (biochemistry), a U-shaped four residue segment of a protein

see also turn-based game

Turn (Policy Debate), when an argument that was initially made to support a policy action is shown to adversely affect that action

Turn LP, the self titled album by Turn

Traversal Using Relay NAT, in computing

Turn (knot), a component of a knot that passes around or behind something else

Turn (poker), the fourth of five community cards dealt

Spread (finance), the difference between the buying and the selling prices

Turn (geometry), a unit of angular measure equal to 360°

Tourn, the patrol circuit made by sheriffs in medieval England

Turn (album) by Great Big Sea

Turn (Ex album) by The Ex

"Turn" (song), a single by the Scottish band Travis

"Turn" (Feeder single), a single by the Welsh band Feeder