Definition of "jumper"

jumper¹

/ˈd͡ʒʌmpə/

noun
plural jumpers
1. Someone or something that jumps, e.g. a participant in a jumping event in track or skiing.
2. A person who attempts suicide by jumping from a great height.
  Quotations
  Significantly more cervical spine injuries were seen in fallers as opposed to jumpers.
  2016, Michael P. Burke, Forensic Pathology of Fractures and Mechanisms of Injury
  With the jumpers and the drowners, McGee, you don't pick up a pattern. That's because a jumper damned near always makes it the first time, and a drowner is usually almost as successful, about the same rate as hangers.
  2017, Ronald V. Clarke, Suicide: Closing the Exits
3. A short length of electrical conductor, to make a temporary connection. Also jump wire.
4. (electricity) A removable connecting pin on an electronic circuit board.
5. A long drilling tool used by masons and quarry workers, consisting of an iron bar with a chisel-edged steel tip at one or both ends, operated by striking it against the rock, turning it slightly with each blow.
6. (US) A crude kind of sleigh, usually a simple box on runners which are in one piece with the poles that form the thills.
  Quotations
  a jumper was found prepared to receive Mrs. Willoughby ; and the horse being led by the Captain himself , a passage through the forest was effected as far as the head of the Otsego
  1843, James Fenimore Cooper, Wyandotte
7. (arachnology, informal) A jumping spider.
8. The larva of the cheese fly.
9. (historical, 18th century) One of certain Calvinistic Methodists in Wales whose worship was characterized by violent convulsions.
10. (horology) A spring to impel the starwheel, or a pawl to lock fast a wheel, in a repeating timepiece.
11. (basketball) A shot in which the player releases the ball at the highest point of a jump; a jump shot.
12. A nuclear power plant worker who repairs equipment in areas with extremely high levels of radiation.
  Quotations
  In nuclear plants, robots toil for hours at a time in highly radioactive areas in place of hundreds of employees, called jumpers or glowboys, who worked in short relays so as to minimize their exposure.
  1987 September 14, Gene Bylinskey, “Invasion of the service robots”, in Fortune
13. (video games) A platform game based around jumping.
  Quotations
  This is an extremely hard to find platform jumper centered around everyone's favorite dot eating hero.
  2002, Andy Slaven, Video Game Bible, 1985-2002, page 161
verb
third-person singular simple present jumpers, present participle jumpering, simple past and past participle jumpered
1. (transitive) To connect with an electrical jumper.

jumper²

/ˈd͡ʒʌmpə/

noun
plural jumpers
1. (chiefly Britain, Australia, New Zealand) A woollen sweater or pullover.
  Quotations
  The hideous holiday jumper became a big trend in the 1980s, influenced as we were by the TV-am gang, Gordon the Gopher and memories of Andy Williams singing to girls as they walked by on his Christmas specials. (Can't blame 'em, given he was wearing one of his knitted monstrosities.)
  2012 December 16, Robert Epstein, “Bring Modern: Christmas jumpers”, in The Independent‎
2. A loose outer jacket, especially one worn by workers and sailors.
3. (US) A one-piece, sleeveless dress, or a skirt with straps and a complete or partial bodice, usually worn over a blouse by women and children; pinafore.
4. (usually plural, jumpers) Rompers.
5. (Australian rules football) The shirt worn by the players; a guernsey.