| Acronym | Definition |
|---|
| CTR | Center |
| CTR | Centre |
| CTR | Contractor |
| CTR | Click Through Rate |
| CTR | Cooperative Threat Reduction |
| CTR | Cooperative Threat Reduction (Counter-Strike gaming clan) |
| CTR | Council for Tobacco Research |
| CTR | Currency Transaction Report |
| CTR | Choose The Right |
| CTR | Crash Team Racing (Sony video game) |
| CTR | Commute Trip Reduction (program to encourage ridesharing) |
| CTR | Current Transfer Ratio |
| CTR | Center for Transportation Research |
| CTR | Civic Type R (Honda) |
| CTR | Control Zone |
| Ctr | Chlamydia Trachomatis |
| CTR | Call-To-Repair |
| CTR | Center for Telecommunications Research (Columbia University) |
| CTR | California Toxics Rule |
| CTR | Certified Tumor Registrar |
| CTR | Calcitonin Receptor |
| CTR | Carpal Tunnel Release |
| CTR | Copper Transporter |
| CTR | Coater (paper Industry) |
| CTR | Competitive Trail Ride |
| CTR | Cycle Time Reduction |
| CTR | Cash Transaction Report (Indonesia) |
| CTR | Common Technical Regulation |
| CTR | Conservative Talk Radio |
| CTR | Christ the Rock (church) |
| CTR | Computer Technology Research Corp. |
| CTR | Centre de Traumatologie et de Réadaptation (French: Traumatology and Rehabilitation Center; Belgium) |
| CTR | Center for Tobacco Research |
| CTR | Civil Tilt Rotor |
| CTR | Complete the Record (US Army) |
| CTR | Contract Technical Representative |
| CTR | Cardio-Thoracic Ratio |
| CTR | Carlton Trail Railway (Canada) |
| CTR | Close Target Reconnaissance |
| CTR | Customer Technical Representative |
| CTR | Certified Trauma Responder (Association of Traumatic Stress Specialists) |
| CTR | Common Technical Requirements |
| CTR | Certified Technical Representative (construction) |
| CTR | Centre for Transportation Research (National University of Singapore) |
| CTR | Controlled Thermonuclear Reactor |
| CTR | Critical Temperature Resistor |
| CTR | Corrupt the Righteous (mixed drink) |
| CTR | Cost, Time and Resource |
| CTR | Continuous Technology Refreshment |
| CTR | Continuous Technology Refreshment (life cycle strategy) |
| CTR | Children's Term Rider (life insurance) |
| CTR | Combat Training Range |
| CTR | Confidential Treatment Request |
| CTR | Cell Traffic Recording (Mobile Telephony) |
| CTR | Circle to Rectangle (diffusers) |
| CTR | Crazy Town Roswell (Roswell, NM) |
| CTR | Cancer Therapy Reviews |
| CTR | Cost, Time and Resources |
| CTR | Central Texas Refuse |
| CTR | Choose to Rave |
| CTR | Call to Response |
| CTR | Canonical Teacher Resources |
| CTR | Continuous Tone Reproduction |
| CTR | Contractor Task Report |
| CTR | Customer Transceiver (LMDS) |
| CTR | Covering the Reading (UCSMP Math Textbooks) |
| CTR | Control Temperature Ratio |
| CTR | Census Tract Report |
| CTR | (USN Rating) Cryptologic Technician (Collection) |
| CTR | Crave The Rave (rave scene) |
| CTR | Central Travel Record |
| CTR | Core Thrust Reverser |
| CTR | Current Tax Referencer (India) |