unconstitutional
adjective
un·con·sti·tu·tion·al
ˌən-ˌkän(t)-stə-ˈtü-sh(ə-)nəl 
-ˈtyü-
: not according or consistent with the constitution of a body politic (such as a nation)
an unconstitutional infringement on rights
unconstitutionally
adverb
Examples of unconstitutional in a Sentence
an unconstitutional infringement of rights
The law may be unconstitutional.
Recent Examples on the Web
Here it should be recalled that Minnesota's previous Anti-SLAPP law had been ruled unconstitutional on those grounds.
—
Jay Adkisson, Forbes.com, 21 June 2026
The Legislature passes, and the governor signs, legislation that their own lawyers tell them is unconstitutional.
—Letters To The Editor, The Orlando Sentinel, 20 June 2026
The groups — writing on behalf of Somerville Jewish residents — argue that the law is unconstitutional and would expose the city to significant legal and financial risks.
—Rick Sobey, Boston Herald, 18 June 2026
Heuermann is not facing the death penalty because capital punishment was declared unconstitutional in New York in 2004, according to the Death Penalty Information Center.
—N'dea Yancey-Bragg, USA Today, 17 June 2026
See All Example Sentences for unconstitutional
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Jay Adkisson, Forbes.com, 21 June 2026
The Legislature passes, and the governor signs, legislation that their own lawyers tell them is unconstitutional.
—Letters To The Editor, The Orlando Sentinel, 20 June 2026
The groups — writing on behalf of Somerville Jewish residents — argue that the law is unconstitutional and would expose the city to significant legal and financial risks.
—Rick Sobey, Boston Herald, 18 June 2026
Heuermann is not facing the death penalty because capital punishment was declared unconstitutional in New York in 2004, according to the Death Penalty Information Center.
—N'dea Yancey-Bragg, USA Today, 17 June 2026
See All Example Sentences for unconstitutional
Cite this Entry
“Unconstitutional.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unconstitutional. Accessed 24 Jun. 2026.
Copy CitationKids Definition
unconstitutional
adjective
un·con·sti·tu·tion·al
ˌən-ˌkän(t)-stə-ˈt(y)üsh-nəl
-ən-ᵊl
: not according to or agreeing with the constitution of a state or society
unconstitutionally
adverb
-ˈt(y)üsh-nə-lē,
-ən-ᵊl-ē
Legal Definition
unconstitutional
adjective
un·con·sti·tu·tion·al
ˌən-ˌkän-stə-ˈtü-shə-nəl, -ˈtyü-
: contrary to or failing to comply with a constitution
especially
: violative of a person's rights guaranteed by the U.S. Constitution
an unconstitutional search and seizure
unconstitutionally
adverb
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