Meaning of the word "first letter" in English

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

first letter

US /fɜrst ˈlɛtər/
UK /fɜːst ˈlɛtə/

Noun

the initial letter of a word or name

Example:
Please write your first letter of your name in the box.
The first letter of 'apple' is 'a'.