composite number

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An integer exactly divisible by at least one positive integer other than itself or 1.

Wiktionary

1. n. A number that is a the product of at least two numbers other than itself and 1.

GNU Webster's 1913

1. adj. (Math.) one which can be divided exactly by a number exceeding unity, as 6 by 2 or 3.

WordNet 3.0

1. n. an integer that is divisible without remainder by at least one positive integer other than itself and one