Question 1

What does "perk up" mean?

Accepted Answer

To suddenly become more alert, interested, or cheerful.

Question 2

How do you use "perk up" in a sentence?

Accepted Answer

She perked up immediately when she heard that her visa had been approved.

Question 3

Is "perk up" formal or informal?

Accepted Answer

"perk up" is informal — used mainly in casual conversation. Often used to describe a visible, sudden change in energy or mood, such as after hearing good news or having coffee. Also used literally for animals whose ears perk up when alert. In the transitive sense, it can describe improving the appearance or quality of something. Common in both British and American English.

perk up

"up" を含むフレーズ