what does muscle mean
A tissue composed of fibers capable of contracting to effect bodily movement. 2. A contractile organ consisting of a special bundle of muscle tissue, which moves a particular bone, part, or substance of the body: the heart muscle; the muscles of the arm. 3. Muscular strength: enough muscle to be a high jumper.4. Informal Power or authority: put some muscle into law enforcement.. A contractile organ consisting of a special bundle of muscle tissue, which moves a particular bone, part, or substance of the body: the heart muscle; the muscles of the arm.