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high treason

American  

noun

  1. treason against the sovereign or state.


high treason British  

noun

  1. an act of treason directly affecting a sovereign or state

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of high treason

Middle English word dating back to 1350–1400


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Copenhagen dismissed and charged Kauffmann with high treason, which he ignored.

From The Wall Street Journal ● Apr. 11, 2026

He also noted the "absence of the death penalty" even though Burkina Faso recently reinstated it for crimes of high treason.

From Barron's ● Jan. 20, 2026

Unfortunately for the Duke of Buckingham, his 1521 gift of a goblet engraved with the motto "With humble, true heart" did not do the trick, and he was executed the same year for high treason.

From Salon ● Dec. 23, 2024

The rising was ultimately a military failure and Roger's involvement led to his conviction for high treason.

From BBC ● Nov. 30, 2024

After thirteen months of the preparatory examination, the magistrate ruled that he had found “sufficient reason” for putting us on trial in the Transvaal Supreme Court for high treason.

From "Long Walk to Freedom" by Nelson Mandela

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