capital, capital letter, uppercase, upper-case letter, majuscule -- (one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis; "printers once kept the type for capitals and for small letters in separate cases; capitals were kept in the upper half of the type case and so became known as upper-case letters")
Overview of adj majuscule
The adj majuscule has 2 senses
majuscule -- (of or relating to a style of writing characterized by somewhat rounded capital letters; 4th to 8th centuries)
capital, great, majuscule -- (uppercase; "capital A"; "great A"; "many medieval manuscripts are in majuscule script")