may refer to:
- ChAT, Choline Acetyltransferase ; an enzyme that synthesises Acetylcholine
- Chat , a kind of bird
- Chat , the waste rocks produced in mining
- The French word for Cat
- Le Chat , a Belgian comic strip
- Khat , a narcotic plant
- Chatgroups Groups Community
- Chats , the way British soldiers referred to delousing in WW1
- Community Hebrew Academy Of Toronto , a Jewish secondary school in Toronto
- Chat, slang for something bad or used when something bad happens
- Chat, an alternative spelling of the Indian and Pakistani snack food Chaat
- CHAT, an abbreviation of: Checklist for Autisim in Toddlers, which is a medical test
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