劍橋詞典US a piece of clothing for a baby that covers the whole body , sometimes including the arms , legs , and feet , and that fastens between the legs （嬰兒穿的）連身衣 a similar piece of clothing for adults that covers the whole body , including the arms and legs , and sometimes the feet and head . Onesies fasten at the front and are worn when relaxing . （成人穿的）連身衣 返回 onesie