An ongoing winner in a game or contest. / Someone who is chosen to represent a group of people in a contest. / Someone who fights for a cause or status. / Someone who fights on another's behalf.

(attributive) Acting as a champion; having defeated all one's competitors. / (attributive) Excellent; beyond compare.

(transitive) To promote, advocate, or act as a champion for (a cause, etc.). / (obsolete, transitive) To challenge.

(historical) A chain used to give easier access to a pocket watch in the watchpocket of a waistcoat. The Albert style went to a T-bar finding that tucked into a buttoned buttonhole of the waistcoat. From there a further small length of chain hung, to which the wearer attached decorative charms such as fraternity or lodge symbols. The double Albert was a chain draped between both watchpockets, with the T-bar and pendant chain in the middle.

(business) An association of businesses to promote their interests in a community.

The private room of an individual, especially of someone wealthy or noble. / A bedroom. / The private office of a judge. / The room used for deliberation by a legislature.

To enclose in a room. / To reside in or occupy a chamber or chambers. / To place in a chamber, as a round of ammunition. / To create or modify a gun to be a specific caliber.

(probability theory) A discrete-time stochastic process with the Markov property.

A flexible defensive armor, made of a mesh of interlinked metal rings.

(sometimes collectively) A chain letter.