D defs.my
Entry 1 sense Webster, 1913

Astride

/əs-trīd'/ · A·stride · IPA /əˈstɹaɪd/
01 adv. With one leg on each side, as a man when on horseback; with the legs stretched wide apart; astraddle.
  1. 1.
    With one leg on each side, as a man when on horseback; with the legs stretched wide apart; astraddle.
    “Placed astride upon the bars of the palisade.” Sir W. Scott.
    “Glasses with horn bows sat astride on his nose.” Longfellow.