Meaning

noun a person who ousts or supplants someone else

noun a wrongful dispossession

noun the act of ejecting someone or forcing them out

originEtymology tree English oust Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English ouster From oust + -er.

Etymology from Wiktionary, CC BY-SA 3.0