1. having or concerned with polarities or contrasts (Freq. 1) - a Janus-faced view of history - a Janus-faced policy • Similar to: bipolar 2. marked by deliberate deceptiveness especially by pretending one set of feelings and acting under the influence of another - "she was a deceitful scheming little thing"- Israel Zangwill - a double-dealing double agent - "a double-faced infernal traitor and schemer"- W.M.Thackeray • Syn: ambidextrous, deceitful, double-dealing, duplicitous, two-faced, double-faced, double-tongued • Similar to: dishonest, dishonorable • Derivationally related forms: duplicity (for: duplicitous), double-dealing (for: double-dealing), deceitfulness (for: deceitful) 3. having two faces--one looking to the future and one to the past - Janus the two-faced god • Syn: two-faced • Similar to: faced