Search Dictionary
Definition of sideline

sideline

/ˈsaɪd.laɪn/
side · line

Plural:sidelines
•
Adjective:sidelined
•
Past Simple:sidelined
•
Past Participle:sidelined
•
Present Participle:sidelining
JUMP TO:

sideline Lexical Profile

sideline Game Scores & Validity

• noun

1

Either of the two lines bounding the longer sides of an athletic playing field or court, or the area immediately outside them where substitutes and coaches sit.

Example

"The coach paced anxiously along the sideline during the final minutes of the championship match."


2

A position of observing a situation without taking an active part in it (usually used in the plural).

Example

"Instead of watching from the sidelines, several community members volunteered to help organize the charity drive."


3

An activity, business, or job done in addition to one's main occupation, or a secondary line of merchandise sold alongside a primary product.

Example

"She works as an accountant by day, but she runs a profitable baking business as a sideline."

Synonyms
View all synonyms for sideline
Antonyms
View all antonyms for sideline

• verb

1

To remove a player from participation in a game or sport, typically due to injury or disciplinary action.

Example

"A sprained ankle threatened to sideline the star midfielder for the remainder of the tournament."


2

To prevent someone from taking an active or influential part in a situation, or to relegate an issue to a position of lesser importance.

Example

"Critics argued that the committee had tried to sideline environmental concerns during the budget negotiations."

Synonyms
View all synonyms for sideline
Antonyms
View all antonyms for sideline

• Rhymes for sideline

Word Origin & Etymology

Formed in the late 18th century as an English compound of 'side' and 'line', originally referring to a secondary track on a railway or canal before being adopted in sports in the late 19th century.

Cite this Entry


Wordmom. (2026). Definition of Sideline. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sideline
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.