From Wiktionary, the free dictionary
Sino-Vietnamese word from 同 (“same”) and 服 (“clothes”).
(classifier bộ) đồng phục
- (clothing) uniform (distinctive outfit as a means of identifying members of a group)
Nữ sinh cấp 3 phải mặc đồng phục áo dài mỗi thứ 2. Nam sinh vẫn mặc như thường.- High schoolgirls must wear uniform ao dai every Monday. Boys keep wearing their usual uniforms.