Bemoan/bɪˈməʊn/ Definition 1 of 1Pro Tip 1/3Express Sorrow Use 'bemoan' to show you're not just complaining, but also feeling sad or regretful. Fans bemoaned the retirement of their favorite athlete. Pro Tip 2/3Not Always Serious 'Bemoan' can be used for both significant issues and more trivial disappointments. She bemoaned the loss of her favorite lipstick. Pro Tip 3/3Formal Context 'Bemoan' is more formal and poetic than simply saying 'complain' or 'whine'. In the meeting, he bemoaned the decline in sales last quarter.