còi
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
(noun) whistle (device used to make a whistling sound)
Register: informal
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
Nghe tiếng còi là mọi người dừng lại.Everyone stopped when they heard the whistle.
Editorial example (contributed-collins-enriched)
Sources & notes
Imported from Wiktionary (CC BY-SA 4.0, retrieved 2026-07-29); community review pending. source ↗ Local usage: In football, “còi trọng tài” specifically means the referee’s whistle. [contributed-collins-enriched]
Sense 2
Meaning · English
(noun) horn (loud alarm, especially on a motor vehicle)
Register: informal
Sense 3
Meaning · English
(noun) siren (device for making a sound alarm)
Register: informal
Sense 4
Meaning · English
(adjective) skinny; bony
Register: informal
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Common questions
What does “còi” mean?
(noun) whistle (device used to make a whistling sound)
Is “còi” formal or informal?
còi is generally informal.
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