- a musical instrument resembling an accordion but having buttonlike keys, hexagonal bellows and ends, and a more limited range.
- concertina wire.
- to fold, crush together, or collapse in the manner of a concertina: The car concertinaed when it hit the truck.
- to cause to fold or collapse in the manner of a concertina.
- of, relating to, or resembling a concertina: concertina pleats.
- a small hexagonal musical instrument of the reed organ family in which metallic reeds are vibrated by air from a set of bellows operated by the player's hands. Notes are produced by pressing buttons
- to collapse or fold up like a concertina