Pronunciation: (u-strīd'),[key] —prep. 1. with a leg on each side of; straddling: She sat astride the horse. 2. on both sides of: Budapest lies astride the river. 3. in a dominant position within: Napoleon stands astride the early 19th century like a giant.
—adv., adj. in a posture of striding or straddling; with legs apart or on either side of something.