Definition of "muscular"

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 February–July, Edgar Rice Burroughs, “Under the Moons of Mars”, in The All-Story, New York, N.Y.: Frank A. Munsey Co.; republished as “The Escape of the Dead”, in A Princess of Mars, Chicago, Ill.: A[lexander] C[aldwell] McClurg & Co., 1917 October, page 18

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 December 19, Charles Dickens, “Stave Two. The First of the Three Spirits.”, in A Christmas Carol. In Prose. Being a Ghost Story of Christmas, London: Chapman & Hall, […], page 43

Future prime ministers may struggle to replicate the sort of muscular countrywide support that [Narendra] Modi was able to earn.

2014 July 9, Samanth Subramanian, “India after English?”, in The New York Review of Books‎, archived from the original on 10 September 2019