1. The cardinal number equal to 4 + 1.
2. The fifth in a set or sequence.
3. Something, such as a quintet or a basketball team, that has five parts, units, or members.
4. A five-dollar bill.
5. fives (used with a sing. verb) Sports. One of several forms of handball originating in England and played mainly at British schools and universities, in which only the receiving side can score points.

[Middle English, from Old English fīf.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.