| Acronym | Definition |
|---|
| CHI | Chile |
| CHI | Computer-Human Interaction |
| CHI | Cambridge Healthtech Institute |
| CHI | Chicago, Illinois, USA (Airport Code) |
| CHI | Commission for Health Improvement (UK government organization) |
| CHI | California Healthcare Institute |
| CHI | Consumer Health Information |
| CHI | Chimaltenango (Guatemala territorial division) |
| CHI | Computer-Human Interface |
| CHI | Christian History Institute |
| CHI | Centre for Health Informatics (UK) |
| CHI | Children's Health Initiative |
| CHI | Center for HIV Information |
| CHI | Children's Hope International |
| CHI | Centre Hospitalier Intercommunal (French: general hospital for several towns) |
| CHI | Consolidated Health Informatics |
| CHI | Closed Head Injury |
| CHI | Colorado Health Institute (Denver, CO) |
| CHI | Concordia Historical Institute |
| CHI | Cultural Homestay International |
| CHI | Consumer Health Interactive |
| CHI | Children's Hospice International (since 1983; Alexandria, Virginia) |
| CHI | Consumer Health Informatics |
| CHI | Child Health Institute |
| CHI | Certified Home Inspector |
| CHI | Copenhagen Interpretation (Bohr's attempt at Unifiying Quantum Theory) |
| CHI | Children of High Intelligence |
| CHI | Congenital Hyperinsulinism |
| CHI | Children's House International |
| CHI | Coaxial Helicity Injection |
| CHI | Church Handbook of Instructions (Mormon Church) |
| CHI | Center for Humanistic Inquiry |
| CHI | Computational Hydraulics International |
| CHI | Creatinine Height Index |
| CHI | Columbia Helicopters Inc (Aurora, OR) |
| CHI | Consortium for Health Information |
| CHI | Center for Human Identification (University of North Texas) |
| CHI | Collaborative Human Interpreter |
| CHI | Cosmetic and Household Ingredients |
| CHI | Certified Healthcare Instructor |
| CHI | Community Housing, Incorporated |
| CHI | Constantijn Huygens Institut |
| CHI | Champlin Oil and Refining Company |
| CHI | Call Handler Infrastructure |
| CHI | Coastal, Harbor, and Inland Waterways |
| CHI | Claim History Inquiry (insurance) |
| CHI | Cornwall Hemp Initiative |
| CHI | Chinese Language/Langue Chinois |