n. 1. The act or an instance of invoking, especially an appeal to a higher power for assistance. 2. A prayer or other formula used in invoking, as at the opening of a religious service. 3. a. The act of conjuring up a spirit by incantation. b. An incantation used in conjuring. [Middle English invocacion, from Old French, from Latin invocātiō, invocātiōn-, from invocātus, past participle of invocāre, to invoke; see INVOKE.] in′vo·cation·al adj. |
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