costume in English:

1. clothes worn for a certain type of activity

English word "costume"(clothes worn for a certain type of activity) occurs in sets:

Today's list of vocabulary #3

2. special clothes

English word "costume"(special clothes) occurs in sets:

Smart Time 4 1a, 1b, 1c

3. a set of clothes that someone wears to make them looks like someone or something else for example in the play