Entry 2 senses Webster, 1913 Supercelestial · Su·per·ce·les·tial · IPA /ˌsupə(ɹ)səˈlɛsti.əl/ 01 a. Situated above the firmament, or great vault of heaven. 1. Situated above the firmament, or great vault of heaven. 2. Higher than celestial; superangelic.