'Lipless' definitions:

Definition of 'lipless'

(from WordNet)
adjective
Without a lip or lips [syn: lipless, unlipped] [ant: lipped]

Definition of 'Lipless'

From: GCIDE
  • Lipless \Lip"less\ (l[i^]p"l[e^]s), a. Having no lips. [1913 Webster]