noun
upper case; capital letters
A straightforward loanword from English, used in computing, typography, and everyday contexts to refer to uppercase letters.
パスワードにはアッパーケースと数字を含めてください。
Please include upper case letters and numbers in your password.
このフォントのアッパーケースはとても読みやすい。
The upper case of this font is very easy to read.