Conscience/ˈkɑːnʃəns/ Definition 1 of 3Pro Tip 1/3Inner Guide Think of 'conscience' as your moral compass guiding decisions. She listened to her conscience and returned the lost wallet. Pro Tip 2/3Clear vs. Guilty 'Conscience' can feel 'clear' if you've done right, 'guilty' if wrong. After cheating on the test, his guilty conscience troubled him. Pro Tip 3/3Idiomatic Expressions 'To have a conscience' means being aware of right and wrong. He has a conscience, so he always treats others fairly.