uppercase

nouns

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"
capital, capital letter, majuscule, upper-case letter, uppercase
antonym
lowercase

adjectives

relating to capital letters which were kept in the top half of a compositor's type case
"uppercase letters; X and Y and Z etc"
uppercase
antonym
lowercase
is similar to
uppercase
"capital A"; "great A"; "many medieval manuscripts are in majuscule script"
capital, great, majuscule
see also
of or relating to a style of writing characterized by somewhat rounded capital letters; 4th to 8th centuries
majuscule