muscular UK /ˈmʌs.kjʊl.ə/US /ˈmʌs.kjə.lɚ/ adjective5 •Of, relating to, or connected with muscles.It was an effort of the mind, of the will, of the nerves; not muscular, for I could not move even so much as my little finger, but none the less mighty for all that. — 1912 •Brawny, thewy, having strength.It was a strange figure—like a child: yet not so like a child as like an old man, [...] The arms were very long and muscular; the hands the same, as if its hold were of uncommon strength. — 1843 •Having large, well-developed muscles. •(figurative) Robust, strong.Future prime ministers may struggle to replicate the sort of muscular countrywide support that [Narendra] Modi was able to earn. — 2014 •Full-bodied formsmore muscular · most muscular