1

sideline

play
noun side·line \ˈsīd-ˌlīn\

Definition of sideline

  1. 1 :  a line at right angles to a goal line or end line and marking a side of a court or field of play for athletic games

  2. 2a :  a line of goods sold in addition to one's principal lineb :  a business or activity pursued in addition to one's regular occupation

  3. 3a :  the space immediately outside the lines along either side of an athletic field or courtb :  a sphere of little or no participation or activity —usually used in plural

Examples of sideline in a Sentence

  1. She makes and sells jewelry as a sideline.

Circa 1862

First Known Use of sideline

circa 1862


2

sideline

verb side·line

Definition of sideline

  1. transitive verb
  2. :  to put out of action :  put on the sidelines

1913

First Known Use of sideline

1913


SIDELINE Defined for English Language Learners

1

sideline

play
noun side·line \ˈsīd-ˌlīn\

Definition of sideline for English Language Learners

  • : a line that marks the outside edge of a sports field or court

  • : the space outside the area where a game is played on a field or court

  • : a job that is done in addition to your main job

2

sideline

verb side·line

Definition of sideline for English Language Learners

  • : to prevent (a player) from playing in a game especially because of injury, illness, etc.


SIDELINE Defined for Kids

sideline

play
noun side·line \ˈsīd-ˌlīn\

Definition of sideline for Students

  1. 1 :  a line marking the side of a playing field or court

  2. 2 :  a business or a job done in addition to a person's regular occupation



Seen and Heard

What made you want to look up sideline? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a small amount

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • winning-words-from-the-national-spelling-bee-logo
  • Which is the correct spelling of the winning word from 1988?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!