Verb
To stand or sit with anything between the legs, or with the legs astride; to stand over
To step over; to stride over or across; as, to bestride a threshold.
Source: Webster's dictionaryWhen I bestride him, I soar, I am a hawk: he trots the air; the earth sings when he touches it; the basest horn of his hoof is more musical than the pipe of Hermes. William Shakespeare
No matter in what shape it comes, whether from the mouth of a king who seeks to bestride the people of his own nation and live by the fruit of their labor, or from one race of men as an apology for enslaving another race, it is the same tyrannical principle. Abraham Lincoln
Why, man, he doth bestride the narrow world Like a Colossus; and we petty men Walk under his huge legs, and peep about To find ourselves dishonourable graves. William Shakespeare
mount a horse Source: Internet