sideline

• side line
• side-line

side +‎ line

• IPA^(key): /ˈsaɪdlaɪn/

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sideline (plural sidelines)

1. A line at the side of something.
   • 1809, William Nicholson, “CALLIONYMUS”, in The British Encyclopedia, or Dictionary of Arts and Sciences; […], volume II (B … E), London: Printed by C[harles] Whittingham, […]; for Longman, Hurst, Rees, and Orme, […], OCLC 978021632, column 1:

     Like most other fishes, the dragonet varies slightly in colour in different individuals, and at different seasons of the year. Mr. Pennant describes the pupils of the eyes to be of a rich sapphirine blue; the irides fine fiery carbuncle; the pectoral fins light brown; the side-line straight; the colours of the fish yellow, blue, and white, making a beautiful appearance when fresh taken.

2. Something that is additional or extra or that exists around the edges or margins of a main item.

   She started the business as a sideline to her regular work and it ended up becoming the greater source of income.

   Soup need not be just a sideline to a meal; if you like, it can be the main course.

3. A line for hobbling an animal by connecting the fore and the hind feet of the same side.
4. (sports) A line defining the side boundary of a playing field.
5. (sports) Usually in the plural: the area outside the playing field beyond each sideline.

   The coach stood on the sidelines and bellowed commands at the team.

6. (figuratively) The outside or perimeter of any activity.

   She installed the whole fixture while he simply watched from the sidelines.

7. (Canada) A secondary road, especially a byroad at right angles to a main road.

sideline (third-person singular simple present sidelines, present participle sidelining, simple past and past participle sidelined)

1. (sports, transitive) To place on the sidelines; to bench or to keep someone out of play.

   The coach sidelined the player until he regained his strength.

   • 2019 November 14, Phil McNulty, “England 0-0 Brazil”, in BBC News‎:

     Gomez got his chance with Gary Cahill sidelined and took it superbly with an assured performance as part of a three-man defence Southgate now looks certain to use at the World Cup.

2. (transitive) To remove or keep out of circulation or out of the focus.

   The illness sidelined him for weeks.

   • 2017 August 13, Brandon Nowalk, “Oldtown offers one last game-changing secret as Game Of Thrones goes behind enemy lines (newbies)”, in The Onion AV Club‎:

     Subplots that might have been fun to explore were relegated or eventually sidelined altogether in the case of characters like Gendry, who disappeared for years and finally resurfaces as a blacksmith in King’s Landing, literally waiting for the call to his hero’s journey.

• disilene, lineside