Meaning of the word "at the cost of" in English

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

at the cost of

US /æt ðə kɔst əv/
UK /æt ðə kɒst əv/

Idiom

resulting in the loss or damage of something

Example:
He achieved success at the cost of his health.
They won the battle at the cost of many lives.