Definition of muscle in
- His competitors have tried to muscle in on his business.
: a body tissue consisting of long cells that contract when stimulated and produce motion
: an organ that is essentially a mass of muscle tissue attached at either end to a fixed point and that by contracting moves or checks the movement of a body part
: muscular strength : brawn
: to move or force by or as if by muscular effort
: to make one's way by brute strength or by force
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