Entry 2 senses Webster, 1913 Hilly /hĭl'-ē/ · Hill·y · IPA /ˈhɪli/ 01 a. Abounding with hills; uneven in surface; as, a hilly country. 1. Abounding with hills; uneven in surface; as, a hilly country. 2. Lofty; as, hilly empire.[Obs.]