case-sensitive
adjective
case-sen·si·tive
ˈkās-ˈsen(t)-sə-tiv 
-ˈsen(t)s-təv
: requiring correct input of uppercase and lowercase letters
Having the Caps Lock key on accidentally can also lead to a frustrating series of "wrong password" alerts when trying to use a case-sensitive password for your office network or Internet provider.—
J. D. Biersdorfer
J. D. BiersdorferExamples of case-sensitive in a Sentence
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The code is case-sensitive and will only work in all caps.
—Ingrid Vasquez, People.com, 8 May 2025
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Ingrid Vasquez, People.com, 8 May 2025
Cite this Entry
“Case-sensitive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/case-sensitive. Accessed 31 Oct. 2025.
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