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Fall ill Meaning in English

expression

Definition

To become sick or unwell, often suddenly.

Usage & Nuances

Semi-formal and somewhat old-fashioned in everyday English. Common in writing and medical or official contexts. Usually describes someone suddenly becoming sick, not just feeling a little unwell. In casual conversation, 'get sick' is more common.

Example Sentences

He fell ill during his trip to India.

basic

If you fall ill, you should go to the doctor.

basic

The teacher suddenly fell ill in the middle of class.

natural

She had to cancel her plans because she fell ill over the weekend.

natural

People often fall ill when the weather suddenly changes.

natural

Many people fell ill after eating the seafood.

basic