There are 2 definitions of jumper in English:

jumper1

Line breaks: jump¦er
Pronunciation: /ˈdʒʌmpə
 
/

noun

1British A knitted garment typically with long sleeves, worn over the upper body.
More example sentences
  • She was wearing a black jumper, body warmer, black trousers and brown boots with a fur lining.
  • Sams wears organic linen shirts and jumpers Fairley has knitted for him from organic wool.
  • Terri was very skinny, and invariably wore huge, brightly coloured and loosely knitted jumpers which hung on her (rather aptly) like camouflage netting.
2 historical A loose outer jacket worn by sailors.
3North American A pinafore dress.
More example sentences
  • I am in a red jumper, white blouse and tights and black Mary Janes with a small scuff on the left toe.
  • The plump and harried mother, dressed in a denim jumper, drives a battered Econo-Van with numerous dents.
  • She wore a tattered denim jumper and a white shirt that matched the spotted peeling wallpaper, and she knew nothing of wealth.

Origin

mid 19th century (in sense 2): probably from dialect jump 'short coat', perhaps from Scots jupe 'a man's (later also a woman's) loose jacket or tunic', via Old French from Arabic jubba. Compare with jibba.

Definition of jumper in:

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Word of the day setose
Pronunciation: ˈsiːtəʊs
adjective
bearing bristles or setae; bristly

There are 2 definitions of jumper in English:

jumper2

Line breaks: jump¦er
Pronunciation: /ˈdʒʌmpə
 
/

noun

1A person or animal that jumps: the horse should be a better jumper this season other players in the line-out may only move when the jumper has touched the ball an Olympic jumper
More example sentences
  • Is the flea the greatest jumper in the animal world, or a skittering frog one of the hot contenders for the swimming title?
  • We now love jumping and he's an amazing jumper, galloping and hacking.
  • He tells us that the horse is a natural jumper.
2 (also jumper wire) A short wire used to shorten an electric circuit or close it temporarily.
More example sentences
  • I read it wrong and placed the jumper wire in the E and F leads.
  • Any problems with the coaxial cable, connectors, jumpers, or the antenna will show up as an abnormality on the display.
  • It is software-configurable with no jumpers, and a 12V control switch is provided for flash memory programming.
3 Nautical A rope made fast to keep a yard or mast from jumping.
4A heavy chisel-ended iron bar for drilling blast holes.
5A mushroom-shaped brass part in a tap which supports the washer.

Definition of jumper in: