[in.voke] vt in.voked ; in.vok.ing [ME, fr. MF invoquer, fr. L invocare, fr. in- + vocare to call, fr. voc-, vox voice--more at voice] (15c) 1 a: to petition for help or support b: to appeal to or cite as authority
2: to call forth by incantation: conjure
3: to make an earnest request for: solicit
4: to put into effect or operation: implement
5: bring about, cause -- in.vok.er n