Definitions
1.verbTo undo the process of knowing, to lose knowledge of something.
2.nounA variable (usually x, y or z) whose value is to be found.
3.nounAny thing, place, or situation about which nothing is known; an unknown fact or piece of information.
4.nounA person of no identity; a nonentity
5.adjective(sometimes postpositive) Not known; unidentified; not well known.