deceit or treachery

(music) A pair of reeds, in any of several wind instruments, that are joined together and vibrate together. / (music, by extension) An instrument using a double reed.

To trick someone by appearing to bluff, while not bluffing.

plural of double obelus

A typographical symbol: ‡, also called a double dagger.

(botany) Bicrenate.

Alternative spelling of double entendre

plural of double entendre

(transitive, intransitive) To format (a document) so that every other line is left blank, leaving sufficient whitespace for annotation (e.g. a teacher's corrections).

To disengage the clutch twice in quick succession to change gear on a vehicle with no synchromesh.