A person of no identity; a nonentity
A variable (usually x, y or z) whose value is to be found.
Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
Not known; unidentified; not well known.
A common, ordinary person.
The common people.
The vernacular tongue or common language of a country.
Being a vulgar fraction.
Common, usual; of the typical kind.
Debased, uncouth, distasteful, obscene.
Having to do with ordinary, common people.