Meaning of the word "barking up the wrong tree" in English

What does "barking up the wrong tree" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

barking up the wrong tree

US /ˈbɑːrkɪŋ ʌp ðə rɔŋ triː/
UK /ˈbɑːkɪŋ ʌp ðə rɒŋ triː/
"barking up the wrong tree" picture

Idiom

to be pursuing a mistaken course of action or to have a wrong idea about something

Example:
If you think I stole your pen, you're barking up the wrong tree; I haven't seen it.
The police were barking up the wrong tree when they suspected the innocent man.