What is "case insensitive"

a. (context computer science English) Treating or interpreting uppercase and lowercase letters as being the same. Often used in computer science to indicate a comparison or equality test that does not distinguish between letters that only differ in case. alt. (context computer science English) Treating or interpreting uppercase and lowercase letters as being the same. Often used in computer science to indicate a comparison or equality test that does not distinguish between letters that only differ in case.