WordWeb Online

1. Marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another
   "a double-dealing double agent";
   - ambidextrous, deceitful, duplicitous, Janus-faced, two-faced, double-faced, double-tongued

1. Acting in bad faith; deception by pretending to entertain one set of intentions while acting under the influence of another
   - duplicity

Derived forms: double-dealings

See also: dishonest, dishonorable [US], dishonourable [Brit, Cdn]

Type of: deceit, deception, dissembling, dissimulation

Encyclopedia: Double-dealing