Definition of: invocation

(in′vō·kā′shən) noun
1. The act of invoking.
2. A judicial order.
3. Eccl. A form of prayer, as at the opening of a service.
4. An appeal invoking the Muses or some divine being, at the beginning of an epic or other work.
5. The act of conjuring an evil spirit.
6. The formula or incantation thus used. See synonyms under PRAYER. [<OF <L invocatio, -onis <invocare. See INVOKE.]