Wordnet 3.0
NOUN (1)
1.
a female lion;
The Collaborative International Dictionary of English v.0.48:
Lioness \Li"on*ess\ (l[imac]"[u^]n*[e^]s), n. [OF. lionesse.]
(Zool.)
A female lion.
[1913 Webster]
WordNet (r) 3.0 (2006):
lioness
n 1: a female lion