Entry 1 sense Webster, 1913 Haply /(hăp"ly̆)/ · Hap·ly · IPA /ˈhæpli/ 01 adv. By hap, chance, luck, or accident; perhaps; it may be. 1. By hap, chance, luck, or accident; perhaps; it may be. “Lest haply ye be found even to fight against God.” — Acts v. 39.