uppercase

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Of, printed, or formatted in capital letters.
• transitive verb To put (type or text) in uppercase letters.
• transitive verb To begin (a word) with an uppercase letter.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective written in upper case; capital
• noun Alternative spelling of upper case.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis
• adjective relating to capital letters which were kept in the top half of a compositor's type case