Meaning of the word "under the weather" in English

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

under the weather

US /ˈʌndər ðə ˈwɛðər/
UK /ˈʌndə ðə ˈwɛðə/
"under the weather" picture

Idiom

feeling slightly ill or unwell

Example:
I'm feeling a bit under the weather today, so I might go home early.
She's been under the weather for a few days, so she hasn't come to work.