Definition from Wiktionary, the free dictionary
- (transitive) To be astride something, to stand over or sit on with legs on either side, especially to sit on a horse.
- (figuratively) To dominate.
Circa 1599, William Shakespeare, The Tragedy of Julius Caesar, Act I Scene II:
- Why, man, he doth bestride the narrow world / Like a Colossus […] .
to sit with legs on both sides of something
dominate — see dominate