accomplice Meaning, Definition & Usage

  1. noun a person who joins with another in carrying out some plan (especially an unethical or illegal plan)
    confederate.

WordNet

Ac*com"plice noun
Etymology
Ac- (perh. for the article a or for L. ad) + E. complice. See Complice.
Definitions
  1. A cooperator. R.
    Success unto our valiant general, And happiness to his accomplices! Shak.
  2. (Law) An associate in the commission of a crime; a participator in an offense, whether a principal or an accessory. "And thou, the cursed accomplice of his treason." Johnson. It is followed by with or of before a person and by in (or sometimes of) before the crime; as, A was an accomplice with B in the murder of C. Dryden uses it with to before a thing. "Suspected for accomplice to the fire." Dryden. Syn. -- Abettor; accessory; assistant; associate; confederate; coadjutor; ally; promoter. See Abettor.

Webster 1913