Medical & Health

ER

ˌiː ˈɑːr

noun

What does ER mean?

Emergency Room — for serious emergencies.

Example sentence

"Chest pain? Go straight to the ER."

American usage tip

'Casualty' is British; say ER or emergency room.

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The yearly window to choose insurance plans.
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Common brand of acetaminophen (paracetamol).
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Routine teeth cleaning at the dentist.
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A bad reaction to a substance.

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