| Acronym | Definition |
|---|
| CLSA | Canadian Longitudinal Study on Aging |
| CLSA | Canon Law Society of America |
| CLSA | Credit Lyonnais Securities Asia (Hong Kong) |
| CLSA | California Land Surveyors Association |
| CLSA | Contact Lens Society of America |
| CLSA | College of Literature, Science and the Arts (University of Michigan) |
| CLSA | Courts and Legal Services Act of 1990 (UK) |
| CLSA | Canadian Laboratory Suppliers Association |
| CLSA | Cornell Law Student Association (Cornell Law School) |
| CLSA | Conical Log-Spiral Antenna |
| CLSA | Cooperative Logistics Support Arrangement |
| CLSA | Closed-Loop Stripping Analyses |
| CLSA | Common Language Switching Access (Sprint) |
| CLSA | COMSEC Logistics Support Activity |