Definitions

1. noun

the part of a typeface consisting of capital letters, typically larger and more ornate than the lowercase letters

“The designer made sure to use the right font, with both uppercase and lowercase letters.”

2. adjective

relating to or consisting of capital letters

“The uppercase letters on the sign were easy to read from a distance.”

3. verb

to change or convert (text) to uppercase

“The program will uppercase all the text in the document.”