1. muscle - Noun
2. muscle - Verb
An organ which, by its contraction, produces motion.
The contractile tissue of which muscles are largely made up.
Muscular strength or development; as, to show one's muscle by lifting a heavy weight.
See Mussel.
Source: Webster's dictionaryPatience can't be acquired overnight. It is just like building up a muscle. Every day you need to work on it. Eknath Easwaran
Fearlessness is like a muscle. I know from my own life that the more I exercise it the more natural it becomes to not let my fears run me. Arianna Huffington
The breaking wave and the muscle as it contracts obey the same law. Delicate line gathers the body's total strength in a bold balance. Shall my soul meet so severe a curve, journeying on its way to form? Dag Hammarskjöld
We are adhering to life now with our last muscle - the heart. Djuna Barnes
I got kicked out of ballet class because I pulled a groin muscle. It wasn't mine. Rita Rudner
Skill is only a rumour, until it reaches the muscle. Indonesian Proverb