noun
plural muscles
a body tissue that can contract and produce movement [count]
[noncount] physical strength
power and influence
flex your muscles
verb
muscles; muscled; muscling
[+ obj] :to move (something) by using physical strength and force
to move forward by using physical force [no obj]
muscle in
[phrasal verb]
to use force or influence in a way that is wrong or unwanted in order to become involved in something for selfish reasons - usually + on