v. t. to betray or swindle (a colleague); to promise (a collaborator) one thing and to treacherously do another, to the detriment of the collaborator. Syn. -- cross, betray. [ PJC ]
n. teh act of double-crossing; the betrayal or swindling of a collaborator or colleague. Syn. -- cross, betray. [ PJC ]
n. one who double-crosses another; a person who says one thing and does another. Syn. -- double-dealer, betrayer, traitor. [ WordNet 1.5 ]