Immaculate Conception im·ma·cu·lateconception uncommon noun 1. Roman Catholic holy day first celebrated in 1854 SynonymsImmaculate ConceptionDecember 8 2. (Christianity) the Roman Catholic doctrine that the Virgin Mary was conceived without any stain of original sin SynonymsImmaculate Conception Related words Broader terms religious doctrineholy day of obligation WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
