An object used to release a lock, commonly in groups. Suspected to be sentient life due to continued loss thereof on random (and often important) occasions.
something that almost every song has that is nearly impossible to define, yet if a musician knows the chords to the song he should be able to figure it out.
Key is a word used, when something that has been done or an item has been recieved that makes the currentsituation work. without a key you dont have access.
see also: "clutch"