Having an open top. / (of a vehicle) Having no roof, or having a top folded or detached.

(informal, computing) A programmer who works only on open source programs.

plural of open tuning

(transitive, intransitive) Used other than figuratively or idiomatically: see break, open. / To make a breakthrough on a mystery or problem; to cause a breakthrough to be made.

(clothing) Open at the neck.

(music) A tuning of a guitar or other stringed instrument in which the strings sound a chord when strummed together without being pressed against the fretboard.

plural of re-opening

(UK) A double-deck bus with an open, or partially open, top deck.

(Of an object) that opens, or is designed to open automatically, or opens of its own accord.

Used other than figuratively or idiomatically: see open, door. / (idiomatic, intransitive, or transitive with to or for) to allow access or facilitate