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WordNet (r) 3.0 (2006) (WordNet)

uppercase
adj 1: 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" [ant: {lowercase}]
n 1: 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" [synonym: {capital}, {capital letter},
{uppercase}, {upper-case letter}, {majuscule}] [ant:
{lower-case letter}, {lowercase}, {minuscule}, {small
letter}]