Meaning of the word "an old hand" in English

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

an old hand

US /ən oʊld hænd/
UK /ən əʊld hænd/

Idiom

a person with a lot of experience in a particular area or activity

Example:
She's an old hand at negotiating contracts, so we trust her judgment.
Don't worry, he's an old hand at this kind of work.