Meaning

noun omission of a sound between two words (usually a vowel and the end of one word or the beginning of the next)

noun a deliberate act of omission

originFrom Latin ēlīsiō (“striking out, forcing out”) (whence -ion (“noun suffix denoting action, result, process, state, condition”)), from ēlīsus (“knocked out, forced out”), past participle of ēlīdō (“to knock, dash or strike out”) (whence elide), from ex- (“out, away”) + laedō (“to strike, collide, hurt”) (whence e- (“assimilated form of ex-”)).

Etymology from Wiktionary, CC BY-SA 3.0