Definition

A person who betrays their country, group, or cause by switching to the opposing side.

Example

He was labeled a turncoat after he joined the rival party.

Conversation

Did you hear that Mark is a turncoat now?

Really? I can't believe he switched sides like that.

Yeah, it feels like he betrayed everyone we know.

I guess some people just can't stick to their beliefs.

Synonyms & Antonyms

Root Explanation

Turncoat → It is formed from "turn" (from Old English *turnian*, meaning to rotate or change direction) and "coat" (from Old French *cote*, meaning a garment or covering). The term originally referred to someone who changes sides or allegiances, as if they were changing their coat.

Memory Tip

Think of someone 'changing direction' ('turn') like they would change a 'coat' — that's why a turncoat is someone who switches sides.

Visually Confused Words