1.
dress (casual); one-piece dress
A one-piece dress, top and skirt in one garment. Everyday clothing rather than a formal gown, which is ドレス.
ワンピース (from English "one-piece") refers to a casual, everyday dress—a one-piece garment for women. This is distinct from ドレス, which implies formal attire.
Common types
Distinction from ドレス:
- ワンピース: casual, everyday wear
- ドレス: formal, party or wedding attire
Note: In swimwear, ワンピース refers to a one-piece swimsuit (vs. ビキニ).