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Word of the Day Tuesday, June 9, 2026

coo

/kuː/ interjection · British & US
Valid in UKValid in US
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What does coo mean?

interjection

A soft, low, soothing sound, often used to express contentment or admiration. A gentle, low-pitched sound, often used to express pleasure or approval.

Example

"She let out a happy coo as she saw her baby for the first time."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for coo

Rhymes with coo

Etymologically related