In·voke v. t. [imp. & p. p. Invoked p. pr. & vb. n. Invoking.] To call on for aid or protection; to invite earnestly or solemnly; to summon; to address in prayer; to solicit or demand by invocation; to implore; as, to invoke the Supreme Being, or to invoke His and blessing.
Go, my dread lord, to your great grandsire's tomb, . . .
Invoke his warlike spirit. --Shak.