dommy UK /ˈdɒmi/US /ˈdɑmi/adjective 1noun 1forms 3 adjective1 •(slang) Dominating, dominant.Rita said she thought she’d be a sub, but found in the scene she was ‘getting a bit dommy’. — 2010 noun1 •(old-fashioned) Someone's house or home.Harry Shapiro was crazy about musicians so we headed straight for his dommy. — 1946 formsdommies · more dommy · most dommy