Meaning

noun a happening that is distinctive in a series of related events

noun a brief section of a literary or dramatic work that forms part of a connected series

noun a part of a broadcast serial

originFrom French épisode, from New Latin *epīsodium, from Ancient Greek ἐπεισόδιον (epeisódion, “a parenthetic addition, episode”), neuter of ἐπεισόδιος (epeisódios, “following upon the entrance, coming in besides, adventitious”), from ἐπί (epí, “on”) + εἰς (eis, “into”) + ὁδός (hodós, “way”).

Etymology from Wiktionary, CC BY-SA 3.0