Question 1

What does "feel blue" mean?

Accepted Answer

To feel sad, depressed, or melancholy.

Question 2

How do you use "feel blue" in a sentence?

Accepted Answer

She's been feeling blue since her best friend moved away.

Question 3

Is "feel blue" formal or informal?

Accepted Answer

"feel blue" is informal — used mainly in casual conversation. Common in everyday speech; mild sadness rather than severe depression.

feel blue

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