adv. [ Pref. a- + stride. ] With one leg on each side, as a man when on horseback; with the legs stretched wide apart; astraddle. [ 1913 Webster ]
Placed astride upon the bars of the palisade. Sir W. Scott. [ 1913 Webster ]
Glasses with horn bows sat astride on his nose. Longfellow. [ 1913 Webster ]