according to urban dictionary, a Lioness: 1. a woman older than 60 who stalks men much younger than herself in order to quell a post-menopausal sexual arousal. A lioness is older than the puma, cougar, and jaguar. 2. a 30 something woman who takes care of younger women and helps them realize their potential by being a mentor and source of inspiration. 3. A woman who is dating a younger woman in a lesbian relationship. 4. A extremely independent , ambitious, driven woman who is fierce, backs up her ****, and takes care of her own, friends, and ******. 5. A Female Lion.