What does concertina mean?

The Deinition From A Dictionary Is Below -noun 1. a musical instrument resembling an Accordion but having buttonlike keys, hexagonal bellows and ends, and a more limited range. 2. concertina wire.

-verb (used without object) 3. to fold, crush together, or collapse in the manner of a concertina: The car concertinaed when it hit the truck.

-verb (used with object) 4. to cause to fold or collapse in the manner of a concertina.

-adjective 5. of, pertaining to, or resembling a concertina: concertina pleats.

---- Origin:

appar. coined by the original instrument's inventor, English instrument-maker Charles Wheatstone (1802-75), who patented it in 1829; cf. concertino, seraphina a similar instrument