Definitions

1. noun

Disloyalty or betrayal in the actions or attitudes of a person or group.

“The company’s employees accused the former CEO of treachery for embezzling company funds.”

2. noun

A deliberate act of disloyalty or betrayal, typically involving a breach of trust or a secret agreement with an enemy.

“The spy’s treachery was discovered when he was caught sending secret messages to the enemy’s headquarters.”

3. noun

A quality of being disloyal or unfaithful.

“The politician’s treachery was evident in his decision to switch parties in the middle of the election campaign.”