spec. A person who joins with another specified person in committing a particular crime or other wicked act; an accomplice. Also: a person who…

Chiefly Law. A person who incites or assists someone to commit an arrestable offence, or who knowingly aids someone who has committed such an…

Of a person: = accessory, n. 1.

Law (and thence gen.), in bad sense: One leagued with another or others for an unlawful or evil purpose; an accomplice.

One who confederates with others (esp. for an evil purpose); a confederate, conspirator.

Cant. ? An accomplice or sharer. (Cf. snap, v. 3a). Obsolete.

spec. An associate in crime, a confederate with the principal offender. (From the frequent early use of the word in connection with crime, this…

A person who helps another commit a crime; a partner in wrongdoing. Also figurative.

In legal phraseology: = assister, n. 2.

An associate in crime; an accomplice.

A confederate, an accomplice.

One who agrees with another; an accomplice. Obsolete.

An accomplice or partner in crime; an accessory. Also in extended use.

A person who holds communication with another, esp. secret communication; a confederate, accomplice. Obsolete.

One complicated or mixed up with the affairs of another; an accomplice. Obsolete.

An accomplice, esp. a confederate in a gambling game; a dummy bidder at an auction. slang (chiefly U.S.).

A partner or accomplice in some activity (in early use typically a criminal one); a confederate. In later use chiefly: a friend, an associate.

a (habitual) criminal accomplice. Also humorously in later use: one of a pair of people or things often associated or seen together.

Originally U.S. slang. A companion or close associate; esp. a loyal assistant of a more important or powerful person; (also) a partner in crime, an…

A companion, an assistant, an accomplice; = sidekick, n. 3.

An accomplice, esp. of a swindler or con man. Cf. ampster, n.