Also found in: Thesaurus, Medical, Legal, Idioms, Encyclopedia.


a. An awareness of morality in regard to one's behavior; a sense of right and wrong that urges one to act morally: Let your conscience be your guide.
b. A source of moral or ethical judgment or pronouncement: a document that serves as the nation's conscience.
c. Conformity to one's own sense of right conduct: a person of unflagging conscience.
2. The part of the superego in psychoanalysis that judges the ethical nature of one's actions and thoughts and then transmits such determinations to the ego for consideration.
3. Obsolete Consciousness or awareness of something.
in (all good) conscience
In all fairness; by any reasonable standard.
on (one's) conscience
Causing one to feel guilty or uneasy.

[Middle English, from Old French, from Latin cōnscientia, from cōnsciēns, cōnscient-, present participle of cōnscīre, to be conscious of : com-, intensive pref.; see com- + scīre, to know; see skei- in Indo-European roots.]

con′science·less adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.conscienceless - lacking a conscienceconscienceless - lacking a conscience; "a conscienceless villain"; "brash, unprincipled, and conscienceless"; "an unconscionable liar"
unconscientious - not conscientious;


Lacking scruples or principles:
References in classic literature ?
He is a subtle, conscienceless Italian, who though he very likely dreams of crime, dares not commit it; and unlike Cromwell, who disposes of both Houses, Mazarin has had the queen to support him in his struggle with the parliament.
No one but a nation of pirates, of ferocious and conscienceless huns, could have inaugurated such a campaign.
The ocean has the conscienceless temper of a savage autocrat spoiled by much adulation.
How far she developed and illustrated that conscienceless and austere doctrine to the girl- friends, who were mere transient shadows to her husband, I could not tell.
even battered, brazen, beautiful, conscienceless, heartless, Mrs.
Days earlier, another youth had fallen prey to equally conscienceless villains.
One issue with the imported stents was also that in certain cases it also emerged that substandard stents were imported and inserted in patients putting their life at risk just to pocket more money by the conscienceless people.
In essence, such a development would confront us with entities vastly stronger, sturdier, and more intelligent than ourselves, but which presumably would be conscienceless.
Garba Abari, has condemned the lingering scarcity of Premium Motor Spirit (PMS) across the country, describing it as a ploy by conscienceless and unpatriotic marketers to force government to increase the pump price of the products.
That list is far from the complete list of shenanigans that were committed - at great cost to taxpayers - by greedy and conscienceless people in the government.
Goethe said in an aphorism that only the meditating man can afford a pure conscience, while an acting man is conscienceless.
And letting either have a say in that which "shall not be infringed" makes the job of conscienceless wolves a no-risk proposition.