Entry 1 sense Webster, 1913 Egregiously /ĭg-rēj'-əs-lē/ · E·gre·gious·ly · IPA /ɪˈɡɹid͡ʒəsli/ 01 adv. Greatly; enormously; shamefully; as, egregiously cheated. 1. Greatly; enormously; shamefully; as, egregiously cheated.