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

Lack of support compounded 'traitor' narrative, Greene says Greene was one of the president's earliest and loudest supporters during his first term, and worked relentlessly on his reelection campaign in 2024, appearing with the president at multiple events. —Irene Wright, USA Today, 29 May 2026

There’s Tom Steyer, the billionaire class traitor running as a tax-the-rich progressive. —Aidan McLaughlin, Vanity Fair, 29 May 2026

Sounds to me like there’s an inside traitor. —Voice Of The People, New York Daily News, 27 May 2026

When news of Israel’s secret outposts in Iraq’s desert emerged, Iraqis admonished their leaders as traitors, and the boisterous militiamen affiliated with the government as impostors for allowing their land to be colonized by an enemy. —Nabil Salih, Time, 26 May 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