I. adjective Date: 14th century not known or not well-known; also having an unknown value <
an unknown quantity
II. noun Date: 1597 1. one that is not known or not well-known; especially a person who is little known (as to the public) 2. something that requires discovery, identification, or clarification: as a. a symbol (as x, y, or z) in a mathematical equation representing an unknown quantity b. a specimen (as of bacteria or mixed chemicals) required to be identified as an exercise in appropriate laboratory techniques

New Collegiate Dictionary. 2001.


Look at other dictionaries:

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