Wordnet 3.0
ADJECTIVE (2)
1.
lacking principles or moral scruples;
- Example: "freedom from coarse unprincipled calumny"- A.E.Stevenson2.
having little or no integrity;
The Collaborative International Dictionary of English v.0.48:
Unprincipled \Un*prin"ci*pled\, a. [Pref. un- not + principled.]
Being without principles; especially, being without right
moral principles; also, characterized by absence of
principle. -- Un*prin"ci*pled*ness, n.
[1913 Webster]
WordNet (r) 3.0 (2006):
unprincipled
adj 1: lacking principles or moral scruples; "freedom from
coarse unprincipled calumny"- A.E.Stevenson [ant:
principled]
2: having little or no integrity