Source : Webster's Revised Unabridged Dictionary (1913)

Furtive \Fur"tive\, a. [L. furtivus, fr. furtum theft, fr. fur
   thief, akin to ferre to bear: cf. F. furtif. See {Fertile}.]
   Stolen; obtained or characterized by stealth; sly; secret;
   stealthy; as, a furtive look. --Prior.

         A hasty and furtive ceremony.            --Hallam.

Source : WordNet®

furtive
     adj 1: marked by quiet and caution and secrecy; taking pains to
            avoid being observed; "a furtive manner"; "a lurking
            prowler"; "a sneak attack"; "stealthy footsteps"; "a
            surreptitious glance at his watch"; "someone skulking
            in the shadows" [syn: {lurking}, {skulking}, {sneak(a)},
             {sneaky}, {stealthy}, {surreptitious}]
     2: secret and sly or sordid; "backstairs gossip"; "his low
        backstairs cunning"- A.L.Guerard; "backstairs intimacies";
        "furtive behavior" [syn: {backstair}, {backstairs}]