What is a secondary school graduate called?

terminology american-english british-english transatlantic-differences

I think graduate indicates only a university graduate in British English, but in American English can it perhaps also suggest a high-school graduate as well?

Could anyone tell me something about that?


I speak AmE, but I have encountered the term school-leaver or school leaver in BrE and AuE writings.

Collins Dictionary defines school leaver:

School leavers are young people who have just left school, because they have completed their time there.

Cambridge Dictionary defines school-leaver:

a young person who is about to leave or has just left secondary school

Related

What does "cold balls" exactly mean in American english?
Term for men in their twenties or thirties?
IF EXISTS in T-SQL
What is the difference between 'I almost completed...' and 'I have almost completed...'
Inhibit Matlab Window Focus Stealing
Extensive planning, stringent testing and uncompromising quality control gives our customers confidence in our products. Give or gives?
What are these pieces of cooking equipment called? [closed]
Cancel event on input type="file"
What is an alternative expression to "this"?
The meaning of "full of them" in context
Can we use 'calm' as a noun?
Word for responding to criticism by beating one's self up, forcing a switch from criticizing to comforting