a large keyboard instrument, each key of which operates a small, felt-covered hammer that strikes and vibrates a corresponding wire or set of wires stretched on a metal frame that is enclosed in a wooden case of various forms
See piano in American Heritage Dictionary 4
(pē-ănˈō, pyănˈō)
nounpl.pi·an·os
A musical instrument with a manual keyboard actuating hammers that strike wire strings, producing sounds that may be softened or sustained by means of pedals.
(pē-äˈnō, pyäˈ-)Music
adverb & adj. Abbr. p
In a soft or quiet tone. Used chiefly as a direction.