| Acronym | Definition |
|---|
| CLO | Chief Learning Officer |
| CLO | Clothing |
| CLO | Cornell Laboratory of Ornithology |
| CLO | Collateralized Loan Obligation |
| ClO | Hypochlorite |
| ClO | Chlorine Monoxide |
| CLO | Cello |
| CLO | Cod Liver Oil |
| CLO | Chief Legal Officer (corporate title) |
| CLO | Civic Light Opera (Pittsburgh, Pennsylvania) |
| CLO | Commissariat aux Langues Officielles (Office of the Commissioner of Official Languages - Canada) |
| CLO | Community Liaison Office |
| CLO | Civil Liberties Organization |
| CLO | Chief Logistics Officer |
| CLO | Community Living Opportunities (Lawrence, KS) |
| CLO | Continental Liaison Office |
| CLO | Cali, Colombia - Alfonso Bonilla Aragon (Airport Code) |
| CLO | Community Living Ontario |
| CLO | Customer Liaison Officer (business) |
| CLO | Certified Leasing Officer (Real Estate Institute of Canada accreditation) |
| CLO | Collegiate Living Organization |
| CLO | Control Link Oscillator |
| CLO | columnar-lined oesophagus |
| CLO | Campylobacter-Like Organism Test (rapid urease test for Helicobacter pylori infection) |
| CLO | Cryptographic Log On |
| CLO | Chief Loan Officer (finance; various companies) |
| CLO | Congressional Liaison Officer |
| CLO | Centrum Landbouwkundig Onderzoek (Dutch: Agricultural Research Center; Belgium) |
| CLO | Culture Loisirs Orvault (French recreation center) |
| CLO | Cross-Layer Optimizer |
| CLO | Contingency Liaison Officer |
| CLO | Constant Level Oiler |
| CLO | Certified Local Ombudsman |
| CLO | Civil Liaison Officer |
| CLO | Chief Linguistics Officer (yourDictionary.com) |
| CLO | Chris Lawrence Online |
| Clo | Thermal Insulation of Clothes (unit of measure) |
| CLO | Commercial Light Oil |
| CLO | Calibrated Lumpy Ore (mining) |
| CLO | Contact Loved Ones |
| CLO | Compost-Like Output |