Meaning of the word "above board" in English

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

above board

US /əˈbʌv bɔrd/
UK /əˈbʌv bɔːrd/
"above board" picture

Idiom

legitimate, honest, and open

Example:
All their business dealings are completely above board.
We need to make sure everything is above board before we sign the contract.