A person or thing of distinction.
Worthy of note; remarkable; memorable; noted or distinguished.
Easily noted (without connotations of value); clearly noticeable, conspicuous.
That can be observed; perceptible.
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.