muscle (muscles plural & 3rd person present) (muscling present participle) (muscled past tense & past participle )
1 n-var A muscle is a piece of tissue inside your body which connects two bones and which you use when you make a movement.
Keeping your muscles strong and in tone helps you to avoid back problems...
2 n-uncount If you say that someone has muscle, you mean that they have power and influence, which enables them to do difficult things.
(=clout)
Eisenhower used his muscle to persuade Congress to change the law...
3 If a group, organization, or country flexes its muscles, it does something to impress or frighten people, in order to show them that it has power and is considering using it.
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flex one's muscles phrase
The Fair Trade Commission has of late been flexing its muscles, cracking down on cases of corruption.
4 If you say that someone did not move a muscle, you mean that they stayed absolutely still.
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move a muscle phrase
He stood without moving a muscle, unable to believe what his eyes saw so plainly. muscle in phrasal verb If someone muscles in on something, they force their way into a situation where they have no right to be and where they are not welcome, in order to gain some advantage for themselves., (disapproval)