accordion, piano accordion, squeeze box - a portable box-shaped free-reed instrument; the reeds are made to vibrate by air from the bellows controlled by the player

American organ - a free-reed instrument in which air is drawn in through reeds by suction bellows

concertina - free-reed instrument played like an accordion by pushing its ends together to force air through the reeds

free-reed - a reed that does not fit closely over the aperture

harmonica, mouth harp, mouth organ, harp - a small rectangular free-reed instrument having a row of free reeds set back in air holes and played by blowing into the desired hole

harmonium, reed organ, organ - a free-reed instrument in which air is forced through the reeds by bellows

wind instrument, wind - a musical instrument in which the sound is produced by an enclosed column of air that is moved by the breath