re·gret / riˈgret/ • v. (-gret·ted, -gret·ting) [tr.] feel sad, repentant, or disappointed over (something that has happened or been done, esp. a loss or missed opportunity): she immediately regretted her words| I regretted that he did not see you. ∎ used in polite formulas to express apology for or sadness over something unfortunate or unpleasant: any inconvenience to readers is regretted | we regret that no tickets may be exchanged. ∎ archaic feel sorrow for the loss or absence of (something pleasant): my home, when shall I cease to regret you!• n. a feeling of sadness, repentance, or disappointment over something that has happened or been done: she expressed her regret at Virginia's death he had to decline, to his regret. ∎ (often regrets) an instance or cause of such a feeling: she had few regrets in leaving the house. ∎ (often one's regrets) used in polite formulas to express apology for or sadness at an occurrence or an inability to accept an invitation: please give your grandmother my regrets.