Meaning of the word "uppercase letter" in English

What does "uppercase letter" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

uppercase letter

US /ˈʌpərˌkeɪs ˈlɛtər/
UK /ˈʌpəkeɪs ˈlɛtə/

Noun

a capital letter

Example:
Please start each sentence with an uppercase letter.
Your password must contain at least one uppercase letter.