Definition of pianos:
(n) :
(music) A percussive keyboard musical instrument, usually ranging over seven octaves, with white and black colored keys, played by pressing these keys, causing hammers to strike strings.
(adv) :
(music) Softly, as a dynamic in a piece of music.
(adj) :
(music) Soft, quiet.
(v) :
To play the piano.
(v) :
(of or with fingers) To move (the fingers) up and down on, similar to the motions of a pianist playing the piano.
(v) :
To equip with a piano.