double bass

noun

1. the largest instrument of the violin family, having three or, usually, four strings, rested vertically on the floor when played.

noun

1. Also called (US): bass viol a stringed instrument, the largest and lowest member of the violin family. Range: almost three octaves upwards from E in the space between the fourth and fifth leger lines below the bass staff. It is normally bowed in classical music, but it is very common in a jazz or dance band, where it is practically always played pizzicatoInformal name: bass fiddle

adjective double-bass

2. of or relating to an instrument whose pitch lies below that regarded as the bass; contrabass