Meaning

• To call upon (a person, a god) for help, assistance or guidance.

• To 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."

• To call to mind (something) for some purpose.

• To appeal for validation to a (notably cited) authority.

  "In certain Christian circles, invoking the Bible constitutes irrefutable proof."

• To conjure up with incantations.

  "This satanist ritual invokes Beelzebub."

• To bring about as an inevitable consequence.

  "Blasphemy is taboo as it may invoke divine wrath."

• To cause (a program or subroutine) to execute.

  "Interactive programs let the users enter choices and invoke the corresponding routines."