| AD | Anno Domini | 公元 |
| AD | advertisement | 广告 |
| AD | Andorra | 安道尔共和国 |
| AD | Account Director | 客户服务总监、业务指导 |
| AD | Agnus Dei | 神羔(耶稣基督的别名) |
| AD | Air Dried (timber) | 风干(木材) |
| AD | Accidental Damage | 意外损坏 |
| AD | Ancillary Device | 补充设备，辅助设备，外部设备 |
| AD | Autograph Document | 亲笔签署的文件 |
| AD | Administrative Commission [ICAO] | 行政委员会 |
| AD | Agricultural Department [FAO] | 农业司 |
| AD | anti-dumping | 反倾销 |
| AD | adenovirus | 腺病毒 |
| AD | Analog Device Inc | 类比设备公司 |
| AD | Air Defense | 防空 |
| AD | Automatic cash Depositor | 自动存款机 |
| AD | Activity Description | 活动描述 |
| AD | autoimmune disease | 自身免疫病 |
| AD | Active Directory | 主动式目录 |
| AD | Analog to Digitalg | 模拟到数字转换 |
| AD | autosomal dominant inheritance | 常染色体显性遗传 |
| AD | assistant driller | 副司钻 |
| AD | Active Duty | 现役 |
| AD | Associate Degree | 美国大学修满二年课程之肄业证书 |
| AD | Armored Division | 装甲师 |
| AD | Assistant Director | 副导演，助理导演 |
| AD | Athletic Director | 体育指导主任 |
| AD | Aggregate Demand | 累积总需求 |
| AD | Administrative Domain | 行政财产 |
| AD | Absolute Deviation | 绝对变差，绝对偏差 |
| AD | Automatic Differentiation | 自动微分法 |
| AD | Areal Density | 面密度 |
| AD | Advanced Development | 试制(样机, 样品)，高级研制，预先研制 |
| AD | Analysis of Dispersion | 离势[离散度]分析 |
| AD | Attack Director | 打击指挥仪 |
| AD | Addressable Detector | 地址探测器 |
| AD | Art Director | 美术指导 |
| AD | Aerodynamic Decelerator | 气动力减速器 |
| AD | Agriculture Decisions | 《农业决策》 |
| AD | Airdrop | 空投 |
| AD | Airworthiness Directives | 《飞行性能控制》[美] |
| AD | American Documentation | 《美国文献工作》 |
| AD | Architectural Design | 《建筑设计》[英] |
| AD | Army Digest | 《陆军文摘》 |
| AD | Art Digest | 《艺术文摘》 |
| AD | ASTIA Document | 武装部队技术情报局文献[美] |
| AD | Average Depth | 平均深度 |
| AD | Average Deviation | 平均偏差，平均差 |
| AD | alzheimer | 老年性痴呆 |
| AD | Active Database | 主动数据库 |
| AD | adenoid degeneration agent | 腺样变性因子 |
| AD | Address Decoder | 地址译码器 |
| AD | autism disorder | 经典孤独症 |
| AD | Active Desktop | 动态桌面 |
| AD | Administer Domain | 管理域 |
| AD | Application Defend | 应用程序防御体系 |
| AD | Alzheimer disease | 阿兹海默症 |
| AD | Adventure | 冒险 |
| AD | Advertising | 广告 |
| AD | acetylene dichloride | 对称二氯乙烯 |
| AD | Applicable Document | 适用文件 |
| AD | Air Division | 空气部门 |
| AD | Alternativa Demokratika/Alliance for Social Justice (Malta) | Alternativa Demokratika /联盟为社会正义(马耳他) |
| AD | Affiliate Defined | 关联方定义 |
| AD | Right Ear | 右耳 |
| AD | Add Delegations (security permissions) | 添加委派（安全权限） |
| AD | After Death | 死亡后 |
| AD | Archive Device | 存档设备 |
| AD | Aviation Division | 航空事业部 |
| AD | Accidental Discharge | 走火 |
| AD | Addison's Disease | 阿迪生(氏)病,肾上腺皮质机能减退 |
| AD | diphtheria antitoxin | 白喉抗毒素 |
| AD | alcohol dehydrogenase | 醇脱氢酶 |
| AD | aqua destillata | 脱水水 |
| AD | drug addict | 吸毒者 |
| AD | Atopic Dermatitis | 特应性皮炎 |
| AD | Academic Decathlon | 十项全能 |
| AD | aortic dimension | 主动脉尺寸 |
| AD | atomic defense | 原子防御 |
| AD | Alzheimer's Disease | 阿耳茨海默(氏)病:早老性痴呆 |
| AD | Associate Director | 副董事 |
| AD | After Dianetics (L. Ron Hubbard) | 源自戴尼提（L·罗恩·哈伯德） |
| AD | Advanced Design | 高级设计 |
| AD | Addendum | 补遗 |
| AD | Adellion (game) | 阿德利翁（游戏） |
| AD | Address Data | 地址数据 |
| AD | Analog Devices, Inc. | 模拟设备公司。 |
| AD | Access Denied | 访问被拒绝 |
| AD | Awdal (postal region, Somalia) | Awdal（索马里邮政区） |
| AD | Addendum Document (to an OSI Standard; ISO) | 附录文件（OSI标准；ISO） |
| AD | After Divestiture | 剥离后 |
| AD | Alcohol Deprived | 酒精剥夺 |
| AD | Arbeitsgemeinschaft Druckbehälter | Arbeitsgemeinschaft Druckbehälter |
| AD | Assembly District | 集会区 |
| AD | Assignment Date | 派遣日期 |
| AD | Adapted | 改编 |
| AD | Alternate Days | 备用天数 |
| AD | Administration | 管理 |
| AD | Archduke | 大公 |
| AD | Anno Domini (Latin: In the Year of Our Lord; referring to the Gregorian calendar system) | 安诺·多米尼克（拉丁语：在我们的主年；指公历系统） |
| AD | Alliance for Democracy (Nigeria) | 民主联盟（尼日利亚） |
| AD | Appellate Division | 上诉庭 |
| AD | Associated Document | 关联的文档 |