n [C, U]
1 person's awareness of right and wrong with regard to his own thoughts and actions 良心; 是非感
*have a clear/guilty conscience, ie feel one has done right/wrong 问心无[有]愧
* After she had committed the crime, her conscience was troubled, ie she felt very guilty. 她犯罪後, 良心上感到很不安.
* She cheerfully cheats and lies; she's got no conscience at all. 她以撒谎和骗人为乐, 完全没有良心.
* I must go. It's a matter of conscience, ie I think it would be morally wrong not to go. 我必须去, 这是有关良心的事（不去对不起自己的良心）.
* prisoners of conscience, ie people imprisoned because they believe it is wrong to support a political system, etc 政治犯（认为拥护某政治制度等是错误的因而被关押者）.
2 (idm 习语) ease sb's conscience/mind => ease2. have sth on one's conscience feel troubled about sth one has done or failed to do 因做了某事或未能做某事而内疚
*He has several murders on his conscience. 他因为谋害了几个人而受到良心的谴责. in all conscience by any reasonable standard 当然; 的确; 凭良心
*You cannot in all conscience regard that as fair pay. 你在良心上总不能认为那样的报酬算是合理的吧. on one's `conscience making one feel one has done wrong, or left sth undone 使人觉得自己做错了事或该做某事而未做
*It's still on my conscience that I didn't warn her in time. 我未能及时提醒她, 这事至今使我耿耿于怀. search one's heart/conscience => search.
n [U and C]
[Date: 1200-1300; Language: Old French;Origin:Latin conscientia, from conscire 'to be conscious (of being guilty)', from com- ( COM-) + scire 'to know']
the part of your mind that tells you whether what you are doing is morally right or wrong
(=a guilty feeling, because you have done something wrong)
It was his guilty conscience that made him offer to help.
Well, at least I can face them all with a clear conscience (=when you know that you have done nothing wrong) .
a film with a social conscience (=a moral sense of how society should be)
prisoner of conscience
(=someone who is in prison because of their political or religious beliefs)
I can't tell you what to do - it's a matter of conscience (=something that you must make a moral judgment about) .
a crisis of conscience among medical staff (=a situation in which it is very difficult to decide what is the right thing to do)
The dog's sad look pricked her conscience (=made her feel guilty) and she took him home.
a guilty feeling that you have about something bad you have done
twinge/pang of conscience
Ian felt a pang of conscience at having misjudged her.
have no conscience (about sth)
(=not feel guilty about something)
They've no conscience at all about cheating.
on your conscience
if you have something on your conscience, it makes you feel guilty
He didn't want somebody's death on his conscience.
Could you live with that on your conscience?
not in (all/good) conscience
formal if you cannot in all conscience do something, you cannot do it because you think it is wrong
I couldn't in all conscience tell him that his job was safe.
HINT sense 1
Do not confuse with consciousness (=the condition of being awake and aware of thoughts and feelings).
1. However, today's businessman, selling in overseas markets, will frequently meet situations where it is difficult to square his business interests with his moral conscience. 然而，当今做海外销售的商人们经常难以达到既确保自己的商业利益，又无愧道德良心的境地。
2. You should act according to your conscience. 你要凭良心办事.
3. Self-respect and a clear conscience are powerful components of integrity and are the basis for enriching your relationships with others. 自尊和问心无愧是正直的两个重要组成部分，也是加深你与他人关系的基础。
4. Conscience and hard work are valued. 良知和苦干受到推崇。
5. I have a guilty conscience about forgetting to post your letter. 我忘记寄出你的信,为此深感不安.