verb
-grets; -gretted; -gretting
[+ obj] to feel sad or sorry about (something that you did or did not do) :to have regrets about (something)
not used in progressive tenses - used formally and in writing to express sad feelings about something that is disappointing or unpleasant
noun
plural -grets
a feeling of sadness or disappointment about something that you did or did not do [count]
regrets [plural] :a statement saying politely that you will not be able to go to a meeting, party, etc.