Meaning

noun all the gods of a religion

noun a monument commemorating a nation's dead heroes

noun (antiquity) a temple to all the gods

originFrom Latin Pantheon, from Ancient Greek Πάνθειον (Pántheion, “a temple of all gods”), neuter of πάνθειος (pántheios, “of or common to all gods”), from παν- (pan-, “all, everything”) + θεῖος (theîos, “of or for the gods”), from θεός (theós, “god”).

Etymology from Wiktionary, CC BY-SA 3.0