The definition of a complice is another word for an accomplice, an associate or a partner, particularly in a crime.
(noun)An example of a complice is a person who helps someone rob a bank.
See complice in Webster's New World College Dictionary
noun
Origin: ME & OFr < LL complex, a participant, confederate < L complicare: see complicate
See complice in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English
Origin: , from Old French
Origin: , from Late Latin complex, complic-, one closely connected with
Origin: : Latin com-, com-
Origin: + Latin plicāre, to fold; see plek- in Indo-European roots
.