1. [verb] To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead.
2. [verb] (more generally) To feel sorry about (any thing).
3. [noun] Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing.
4. [noun] (obsolete) Dislike; aversion.
5. [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'.
6. [verb] Feel remorse for; feel sorry for; be contrite about.
7. [verb] Feel sad about the loss or absence of.
8. [verb] Decline formally or politely; 'I regret I can't come to the party'.
9. [verb] Express with regret; 'I regret to say that you did not gain admission to Harvard'.
