Is under the weather formal or informal?

It is neutral and common in speech. It is also fine in polite writing.

Is under the weather the same as sick?

Not exactly. It usually means mildly sick or not feeling well.

Can I use under the weather at work?

Yes. It is a polite way to say you are not feeling well.

Does under the weather mean very serious illness?

No. It usually suggests a minor or temporary health problem.

← Dictionary

to-be-under-the-weather

/tə biː ˌʌn.də ðə ˈweð.ə/

IELTSAcademic

phrase

to be slightly ill, tired, or not feeling well. It is usually used for a short-term, mild sickness or low energy.

I'm a bit under the weather today.
She went home early because she felt under the weather.
After the long trip, he was under the weather for two days.

Adinary Nuance

Under the weather is softer than ill or sick. People use it for mild, temporary discomfort, not a serious medical problem. It sounds natural in everyday speech and polite writing, especially when you do not want to sound too direct.

In other languages

Vietnamese: Hơi mệt
Spanish: Indispuesto
Chinese: 身体不舒服
Japanese: 体調が悪い
Korean: 몸이 안 좋다

Etymology

This phrase appeared in English in the 1800s. It may come from sailors who felt sick in bad weather and stayed below deck.

Common phrases

feel under the weathera bit under the weatherlook under the weather

Synonyms

unwell ill off-color

Related words

sick tired exhausted

Frequently asked questions

Is under the weather formal or informal?: It is neutral and common in speech. It is also fine in polite writing.
Is under the weather the same as sick?: Not exactly. It usually means mildly sick or not feeling well.
Can I use under the weather at work?: Yes. It is a polite way to say you are not feeling well.
Does under the weather mean very serious illness?: No. It usually suggests a minor or temporary health problem.