Definitions

1. noun

a body part that has the function of shortening the length of the body or a part of it, and of moving a limb or part of the body

“Her toned muscles made her a competitive athlete.”

2. verb

to cause or make something to contract or become tense

“The doctor instructed her to muscle her way through the pain.”

3. noun

a person or group that has a strong influence or control over something or someone

“The muscle behind the new policy was a powerful corporation.”