Meaning of the word grapheme in English

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

grapheme

US /ˈɡræf.iːm/
UK /ˈɡræf.iːm/

Noun

the smallest functional unit of a writing system

Example:
The letter 'a' is a single grapheme.
In English, 'sh' is a grapheme representing a single sound.