1. Solid and well-developed muscles, especially of the arms and legs.
2. Muscular strength and power.
3. Chiefly British. The meat of a boar.
4. Headcheese.

[Middle English, muscle, from Old French braon, meat, of Germanic origin.]

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.