Meaning

noun a bowl-shaped geological formation at the top of a volcano

noun a faint constellation in the southern hemisphere near Hydra and Corvus

noun a bowl-shaped depression formed by the impact of a meteorite or bomb

originFrom Latin crater (“basin; cup”), from Ancient Greek κρατήρ (kratḗr, “mixing bowl, wassail-bowl”), from κράμα (kráma, “mixture”), from κεράννυμι (keránnumi, “to mix, to mingle”).

Etymology from Wiktionary, CC BY-SA 3.0