Judas \Ju"das\, n.
The disciple who betrayed Christ. Hence: A treacherous
person; one who betrays under the semblance of friendship. --
a. Treacherous; betraying.
[1913 Webster]
{Judas hole}, a peephole or secret opening for spying.
{Judas kiss},
(a) a deceitful and treacherous kiss.
(b) an act appearing to be an act of friendship, which is in
fact harmful to the recipient.
{Judas tree} (Bot.), a leguminous tree of the genus {Cercis},
with pretty, rose-colored flowers in clusters along the
branches. Judas is said to have hanged himself on a tree
of this genus ({Cercis Siliquastrum}). {Cercis Canadensis}
and {Cercis occidentalis} are the American species, and
are called also {redbud}.
[1913 Webster]