unbeauty noun 1verb 1forms 3 noun1 •Lack of beauty; unattractiveness.And she grimaces and distorts her features while she thinks and talks, trying perhaps to distract attention from the un-beauty of her face by keeping it in motion. — 1982 verb1 •(no longer used) To unbeautify. formsunbeautied · unbeautying · unbeauties