a musical instrument that is played by means of a keyboard
a device that requires skill for proper use
the means whereby some act is accomplished
a person used by another to gain an end
the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process
any of various devices or contrivances that can be used to produce musical tones or sounds
device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like
