Definify.com
Webster 1913 Edition
Unprincipled
Un-prin′ci-pled
,Adj.
[Pref.
un-
not + principled
.] Being without principles; especially, being without right moral principles; also, characterized by absence of principle.
– Un-prin′ci-pled-ness
, Noun.
Webster 1828 Edition
Unprincipled
UNPRIN'CIPLED
, a.1.
Not having settled principles; as souls unprincipled in virtue.2.
Having no good moral principles; destitute of virtue; not restrained by conscience; profligate.