IPA: /ˈkɒstjuːmd/
KK: /ˈkɑːstumd/
Dressed in a special outfit, often for a performance or celebration, that is different from everyday clothing.
The children were costumed as their favorite superheroes for the party.
To dress someone or oneself in a particular outfit, often for a special occasion or performance.
The children costumed themselves as superheroes for the school play.
Past: costumed
Past Participle: costumed
Costumed → It is formed from "costume" (from French *costume*, meaning a style of dress) and "-ed" (a suffix indicating a state or condition). The word "costumed" means being dressed in a particular style or outfit, often for a specific occasion or role.
Think of the French word 'costume' which refers to a style of dress, and remember that 'costumed' means being dressed in a specific outfit.