from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not known; unfamiliar: a modern-day problem unknown in earlier times.
- adj. Not identified or ascertained: received flowers from an unknown admirer.
- adj. Not established or verified.
- adj. Not well known or widely known: an unknown artist.
- n. A person or thing that is unknown: "the abyss of the unknown” ( Helena Petrovna Blavatsky).
- n. A person who is not well known, as to the general public: cast an unknown in the starring role.
- n. Mathematics A quantity of unknown numerical value.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not known; unidentified; not well known.
- n. A variable (usually x, y or z) whose value is to be found.
- n. Any fact or place about which nothing is known (as in the phrase "into the unknown").
- n. A person of no identity; a nonentity
from the GNU version of the Collaborative International Dictionary of English
- adj. Not known; not apprehended.
from The Century Dictionary and Cyclopedia
- Not known; not become an object of knowledge; not recognized, discovered, or found out.
- Unknown in this sense is often used in the predicate, followed by to: as, a man unknown to fame; a fact unknown to the public. In this use it is also often used absolntely: as, unknown to me (elliptically for it being unknown to me), he made a new contract.
- Not ascertained, with relation to extent, degree, quantity, or the like; hence, incalculable; inexpressible; immense.
- Not to be made known, expressed, or communicated.
- Not having had sexual commerce.
- n. One who or that which is unknown.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not famous or acclaimed
- adj. not known before
- n. an unknown and unexplored region
- n. a variable whose values are solutions of an equation
- adj. not known to exist
- adj. not known
- adj. being or having an unknown or unnamed source
- n. anyone who does not belong in the environment in which they are found
From un- + known, past participle of know. Cf. Old English ungecnawen. (Wiktionary)