1. (a.) Not lucky; not successful; unfortunate; ill-fated; unhappy; as, an unlucky man; an unlucky adventure; an unlucky throw of dice; an unlucky game.

2. (a.) Bringing bad luck; ill-omened; inauspicious.

3. (a.) Mischievous; as, an unlucky wag.

apocalyptic bad badly off baleful baneful black bodeful boding calamitous cataclysmic catastrophic dark depressed dire direful disastrous donsie doomful dreary evil evil-starred fatal fateful foreboding fortuneless funest gloomy hapless ill ill off ill-boding ill-considered ill-fated ill-omened ill-seasoned ill-starred ill-timed improper in adverse circumstances inappropriate inauspicious inconvenient inexpedient infelicitous inopportune intempestive intrusive irrelevant late lowering luckless mal a propos malapropos menacing mistimed of evil portent off base ominous out of line out of luck out of phase out of time planet-struck portending portentous premature sad short of luck sinister somber star-crossed threatening too late too soon unbefitting unblessed underprivileged unfavorable unfit unfitting unfortunate unhandy unhappy unpromising unpropitious unprosperous unprovidential unready unripe unseasonable unsuitable untimely untoward wrong