Definition - adj [New Latin, literally, of a wild nature] : wild by nature : not usu. tamed Animals like wild ducks or bees are considered ferae naturae. At common law they cannot be claimed as one's property except under certain circumstances, as when captured. Pronunciation'fir-E-n&-'chu'r-E, -'tu'r-, -'tyu'r-; 'fer-"I-nä-'tü-"rI