Idiom: Kill Two Birds with One Stone

to achieve two aims at once

Examples

• Walking to work kills two birds with one stone.

Key rules

• Kill two birds with one stone means achieve two aims with one action
• It is a fixed idiom with the phrase "with one stone" at the end
• It is informal and used in planning
• It describes efficiency

Common mistakes

• Kill two birds with one rock → Kill two birds with one stone