[noun] sadness associated with some wrong done or some disappointment; "he drank to drown his sorrows"; "he wrote a note expressing his regret"; "to his rue, the error cost him the game" Synonyms:sorrow, rue, ruefulness
[verb] feel remorse for; feel sorry for; be contrite about Synonyms:repent, rue
[verb] feel sad about the loss or absence of
[verb] decline formally or politely; "I regret I can't come to the party"
[verb] be sorry; "I regret to say that you did not gain admission to Harvard"