traitor

noun

trai·​tor ˈtrā-tər 

1

: one who betrays another's trust or is false to an obligation or duty

2

: one who commits treason

Synonyms of traitor

• betrayer
• snake

Examples of traitor in a Sentence

She has been called a traitor to the liberal party's cause.

He was a traitor who betrayed his country by selling military secrets to the enemy.

Recent Examples on the Web

Fears have been growing for the fate of the women after they were branded traitors by state media last week, for failing to sing the national anthem before their opening match of the Asian Cup, which is being held in Australia. —Hilary Whiteman, CNN Money, 11 Mar. 2026

McCarthy’s rampage was about rooting out traitors. —Ali Breland, The Atlantic, 6 Mar. 2026

The setting, characters and costumes place viewers squarely in a whimsical world, though that all gets starkly juxtaposed against real human nature when Cummings offers the players an antidote that will save them should they be revealed as the traitors’ secret sacrifice. —Tiney Ricciardi, Denver Post, 3 Mar. 2026

Her competitors easily and near-unanimously tagged her as a traitor and banished her in the third episode. —Lisa Gutierrez, Kansas City Star, 27 Feb. 2026

Word History

Etymology

Middle English traytour, from Anglo-French traitre, from Latin traditor, from tradere to hand over, deliver, betray, from trans-, tra- trans- + dare to give — more at date

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing traitor

• turn traitor

Rhymes for traitor

• cater
• crater
• frater
• freighter
• gator
• grater
• greater
• hater
• krater
• later
• plater
• prater

Kids Definition

traitor

noun

trai·​tor ˈtrāt-ər 

1

: one who betrays another's trust or is false to an obligation or duty

2

: one who commits treason

Etymology

Middle English traitre "traitor," from early French traitre (same meaning), from Latin traditor (same meaning), derived from tradere "to hand over, betray" — related to treason see Word History at treason