Meaning of the word overachiever in English

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

overachiever

UK /ˌəʊvərəˈtʃiːvər/

Noun

a person who does more than they are expected to do or who is more successful than others:

Example:
She was a classic overachiever at college.