- (formal)
the act of asking for help, from a god or from a person in authority; the act of referring to something or of calling for something to appear （向神或权威人士的）求助；祈祷 - (
computing 计算机 the act of making a particular function start 调用；启用
Word Originlate Middle English: via Old French from Latin invocatio(n-), from the verb invocare, from in- ‘upon’ + vocare ‘to call’.