1call on (a deity or spirit) in prayer, as a witness, or for inspiration.
summon (a spirit) by charms or incantation.
2cite or appeal to (someone or something) as an authority for an action or in support of an argument:the antiquated defence of insanity is rarely invoked in England
call earnestly for:she invoked his help against this attack
give rise to; evoke:how could she explain how the accident happened without invoking his wrath?
3 Computing cause (a procedure) to be carried out.
