| Acronym | Definition |
|---|
| BTD | Before the Dawn |
| BTD | Blood Type Diet |
| BTD | Biotinidase (human gene) |
| BTD | Boston Transportation Department (Boston, MA, USA) |
| BTD | Bloons Tower Defense (game) |
| BTD | Banque Togolaise de Développement (French: Togolese Development Bank) |
| BTD | Brightness Temperature Difference |
| BTD | Bored To Death |
| BTD | Balloon Tower Defence (gaming) |
| BTD | Building Trades Directory (website) |
| BTD | Bleed The Dream (band) |
| BTD | Born to Die |
| BTD | Better the Devil (record company) |
| BTD | Bilateral Trade Database |
| BTD | Binary To Decimal |
| BTD | Better Through Design (BTD Manufacturing, Inc.) |
| BTD | Bit Transmission Delay |
| BTD | Bear Trap Dunes (Ocean View, Delaware, USA) |
| BTD | Brothers Till Death (gaming clan) |
| BTD | Best Time of the Day |
| BTD | Beat The Dow |
| BTD | Born to Drink |
| BTD | Biological Therapies in Dentistry (journal) |
| BTD | Barney the Dinosaur (TV character) |
| BTD | Beaulieu-Tan-Damen (pulse shape) |
| BTD | Brigade Tactical Department (US Military Academy) |
| BTD | Business Travel Department |
| BTD | Brutal Torso Dissection (Australian metal band) |
| BTD | Biomechanics Test Database (US National Highway Traffic Safety Administration) |
| BTD | Beg/Begging to Differ |
| BTD | Battle Training Division (US Army) |
| BTD | Buy The Dip (stocks) |
| BTD | Business Technical Division (USACE) |
| BTD | Bortezomib, Thalidomide and Dexamethasone (chemotherapy) |
| BTD | Bureau Technique de Détection (French plumbing technology company) |
| BTD | Born to Drive |
| BTD | Bonneuil Terrassement Démolition (French demolition company) |
| BTD | Block-Type Decodable |
| BTD | Basic Thermodynamics |
| BTD | Bet the Dealer (gaming) |
| BTD | Big Truck Driver |
| BTD | Brown Turtle Designs (Pomona, CA) |
| BTD | Beat the Donk Poker Forum |
| BTD | Bridge to Decision |
| BTD | Black Tie Dinner (various organizations) |
| BTD | Bearing Temperature Detector |
| BTD | Billed to Date |