sweater同jumper有啥分別?

Sweater
1. 毛線衣;(厚)運動衫[C]
She wore a sweater and jeans.
她穿著毛衣及牛仔褲。
2. 大量出汗的人[C]
3. 發汗劑

Jumper
1. (工人、水手等的)工作服
2. (穿在襯衫外的)無袖背心裙
3. 【美】(背心連褲的)娃娃服[P]
4. 【英】(套頭式的)毛線衣

Jumper
noun [C]
1 UK (UK AND US sweater) a woollen item of clothing which covers the upper part of the body and the arms, and which does not open at the front

Sweater
noun [C] (UK ALSO jumper)
a usually woollen piece of clothing with long sleeves which is worn on the upper part of the body

sweater and jumper are the same. One is UK English, jumper (I think) is Amercian english, please check the dictionary