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
In a series of decisions, lower courts have struck down the executive order as unconstitutional, or likely so, even after a Supreme Court ruling in late June that limited judges’ use of nationwide injunctions.
—
Preston Fore, Fortune, 27 Sep. 2025
The Arizona Court of Appeals deemed one section of the law unconstitutional, and now the Supreme Court must decide what that means for the law as a whole.
—Taylor Seely, AZCentral.com, 27 Sep. 2025
The appeals court reversed a lower court decision that found a state law shrinking the council’s size from 40 to 20 members unconstitutional.
—Vivian Jones, Nashville Tennessean, 26 Sep. 2025
The Fair School Funding Formula, signed into law in 2021, overhauled the way the state approached public school funding after its long-standing prior model was deemed unconstitutional in 1997.
—Grace Tucker, Cincinnati Enquirer, 26 Sep. 2025
See All Example Sentences for unconstitutional
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Preston Fore, Fortune, 27 Sep. 2025
The Arizona Court of Appeals deemed one section of the law unconstitutional, and now the Supreme Court must decide what that means for the law as a whole.
—Taylor Seely, AZCentral.com, 27 Sep. 2025
The appeals court reversed a lower court decision that found a state law shrinking the council’s size from 40 to 20 members unconstitutional.
—Vivian Jones, Nashville Tennessean, 26 Sep. 2025
The Fair School Funding Formula, signed into law in 2021, overhauled the way the state approached public school funding after its long-standing prior model was deemed unconstitutional in 1997.
—Grace Tucker, Cincinnati Enquirer, 26 Sep. 2025
See All Example Sentences for unconstitutional
Cite this Entry
“Unconstitutional.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unconstitutional. Accessed 4 Oct. 2025.
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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