noun
(music) A small unfretted stringed instrument with four strings tuned (lowest to highest) G-D-A-E, usually held against the chin and played with a bow.
(inexact, sometimes proscribed) Any instrument of the violin family, always inclusive of violins, violas and cellos, and sometimes further including the double bass.
(music, metonymic) A violinist in an orchestra or group.
verb
(ambitransitive) To play on, or as if on, a violin.