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Synonyms

unconstitutional

American  
[uhn-kon-sti-too-shuh-nl, -tyoo-] / ˌʌn kɒn stɪˈtu ʃə nl, -ˈtyu- /

adjective

  1. not constitutional; unauthorized by or inconsistent with the constitution, as of a country.


unconstitutional British  
/ ˌʌnkɒnstɪˈtjuːʃənəl /

adjective

  1. at variance with or not permitted by a constitution

"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

Other Word Forms

Etymology

Origin of unconstitutional

First recorded in 1735–45; un- 1 + constitutional

Explanation

When someone protests an action on the part of the government by saying, "That's vile! That's wrong! That's downright unconstitutional!," they're saying that the action violates the tenets of the U.S. Constitution. The U.S. Constitution is our nation's founding document, laying out a structure for the executive, judicial, and legislative powers, and assigning to people specific rights, such privacy, free speech, and voting. Violations of the Constitution are the highest forms of illegality in our nation, though famously hard to nail down.

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Vocabulary lists containing unconstitutional

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.

Unconstitutional conditions doctrine has been notoriously opaque, convoluted, and inconsistent, even when the court was less conservative.

From Slate • Jul. 29, 2025

"This is awful. Outrageous. Unconstitutional," Kerry Washington wrote.

From Fox News • May 16, 2019

Netflix aired a taped special of "Unconstitutional" this month.

From Los Angeles Times • Aug. 29, 2015

Unconstitutional crimes are incredibly time-consuming and expensive to strike down in court, and until they are struck down, they can chill a lot of entrepreneurial behavior.

From Forbes • Jun. 27, 2013

He was warrantably its usher when the habitual interrupter bawled his stereotyped: "Unconstitutional!"

From The Lincoln Story Book A Judicious Collection of the Best Stories and Anecdotes of the Great President, Many Appearing Here for the First Time in Book Form by Williams, Henry Llewellyn