Entry 2 senses · 2 variants Webster, 1913 Lupercal · Lu·per·cal · IPA a. n. 01 a. Of or pertaining to the Lupercalia. 1. Of or pertaining to the Lupercalia. 02 n. A grotto on the Palatine Hill sacred to Lupercus, the Lycean Pan. 1. A grotto on the Palatine Hill sacred to Lupercus, the Lycean Pan.