Invocation \In`vo*ca"tion\, n. [F. invocation, L. invocatio.]

1. The act or form of calling for the assistance or presence of some superior being; earnest and solemn entreaty; esp., prayer offered to a divine being.

Sweet invocation of a child; most pretty and pathetical! --Shak.

The whole poem is a prayer to Fortune, and the invocation is divided between the two deities. --Addison.

2. (Law) A call or summons; especially, a judicial call, demand, or order; as, the invocation of papers or evidence into court.

Source: Webster's Revised Unabridged Dictionary (1913)