Meaning of the word "top dog" in English

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

top dog

US /tɑp dɔɡ/
UK /tɒp dɒɡ/
"top dog" picture

Idiom

the most important or powerful person in a group or organization

Example:
After years of hard work, he finally became the top dog at the company.
Everyone wants to be the top dog, but few have what it takes.