Meaning & use
treason
The crime of betraying one's country, especially by attempting to overthrow its government or aiding its enemies.
See it in a sentence
The general was executed for treason after secretly negotiating with the invading army.
Leaking classified defense plans to a rival nation can be prosecuted as treason.
A note on using this word
Treason is a specific legal charge in most countries, distinct from the broader, more general idea of 'betrayal.'
Words with a similar meaning
betrayalsedition
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
loyaltyallegiance
Make it your own
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