Meaning of the word "ballpark figure" in English

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

ballpark figure

US /ˈbɔːl.pɑːrk ˈfɪɡ.jər/
UK /ˈbɔːl.pɑːk ˈfɪɡ.ər/

Noun

a rough estimate or approximation of a numerical value

Example:
Can you give me a ballpark figure for the cost of the project?
I don't have the exact numbers, but I can give you a ballpark figure.