Definitions
1.VerbTo call upon (a person, a god) for help, assistance or guidance.
2.VerbTo solicit, petition for, appeal to a favorable attitude."The envoy invoked the King of Kings's magnanimity to reduce his province's tribute after another drought."
3.VerbTo call another ship.
4.VerbTo call to mind (something) for some purpose.
5.VerbTo appeal for validation to a (notably cited) authority."In certain Christian circles, invoking the Bible constitutes irrefutable proof."
6.VerbTo conjure up with incantations."This satanist ritual invokes Beelzebub."
7.VerbTo bring about as an inevitable consequence."Blasphemy is taboo as it may invoke divine wrath."
8.VerbTo cause (a program or subroutine) to execute."Interactive programs let the users enter choices and invoke the corresponding routines."