Of, printed, or formatted in capital letters: an uppercase A; uppercase titles. (adjective)
To put (type or text) in uppercase letters. (verb-transitive)
To begin (a word) with an uppercase letter. (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "uppercase" in a sentence
"Possibly because it is written entirely in uppercase, which surely means something regarding relative rank and importance."
"I guess it's normally written in uppercase, but at least we've got something to call me, and some sort of affiliation."
"All our drawings require all text to be in uppercase."