Definition of Usurp: Usurp (verb): To take (a position of power or importance) illegally or by force. Synonyms: seize, take over, appropriate, commandeer Antonyms: relinquish, surrender, give up, abdicate Memory Tip: Think of “usurp” as someone taking control of something that isn’t rightfully theirs, often using force or underhanded tactics. Conversation and Short Story Examples…