English Reference

Word

offside

Phoneticsoff·side

UK/ˈɒfsaɪd/

Definitions

01sports position

B2 · Sport

adj. in a position on the field that is not allowed by the rules, usually because you are ahead of the ball.

adj. occupying a position on the field of play that is prohibited by the rules, typically involving being ahead of the ball or puck.

“The goal was cancelled because the striker was offside when the ball was kicked.”

“The assistant referee raised his flag immediately, signaling that the winger had been in an offside position during the initial pass.”

Usage

Usually functions as a predicative adjective after the verb 'to be'.

Synonyms

illegal position

Antonyms

02unfair or rude

C1

adj. acting in a way that is unfair, rude, or socially unacceptable.

adj. describing behaviour that is considered unacceptable, unfair, or beyond the bounds of social propriety.

“It was a bit offside of him to leave without saying thank you.”

“His comments during the meeting were completely offside, causing several colleagues to complain to the manager about his lack of professionalism.”

Informal · British English · Slang

Teaching tip

This is a metaphorical extension of the sports term, common in British and Australian English to describe social 'fouls'.

Synonyms

unfairout of orderinappropriate

Antonyms

03side of a vehicle

C2

n. the side of a car or truck that is furthest from the edge of the road.

n. the side of a road vehicle furthest from the kerb; in countries that drive on the left, this refers to the right-hand side.

“The mechanic needs to replace the offside headlight on my car.”

“The accident caused significant damage to the offside front wing, though the driver's side door remained functional.”

British English · Technical

Usage

Often used as a modifier before a noun, such as 'offside wheel' or 'offside mirror'.

Synonyms

right side

Antonyms

nearside

04in an illegal position

B2 · Sport

adv. to be in a position that breaks the rules of a game.

adv. in a manner that violates the positional rules of a sport.

“He ran offside just as his teammate was about to pass the ball.”

“The forward was caught offside three times in the first half, frustrating the team's offensive strategy.”

Antonyms

Real-World Examples

“Daichi Kamada had strayed millimetres offside before volleying in a brilliant cross with the outside of his boot from Yéremy Pino.”
The Guardian · 5 Sept 2026
“Lask had two goals ruled out for offside, and it was a busy night for the Celtic goalkeeper, who made an impressive nine saves to Lask's four.”
BreakingNews.ie · 19 Aug 2026

Etymology

From off- + side. Compare German Abseite (“remote area, backside”), German abseits (“out of the way, apart, aside”, adverb), Dutch afzijdig (“neutral, impartial”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Domain

Sports

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

englishreference.com/q/offside

English Reference