| Administrerende direktor | Vorstandsvorsitzender |
| Administrerende direktør | Chief Executive Officer |
| Admiral | Admiral |
| Admiral Franz Ritter von Hipper | Franz von Hipper |
| Admiral Hipper | Admiral Hipper |
| ADO | ActiveX Data Objects |
| Adobe Flash | Adobe Flash |
| Adobe InDesign | Adobe InDesign |
| Adobe PageMaker | PageMaker |
| Adobe Photoshop | Adobe Photoshop |
| Adobe Systems | Adobe Systems |
| Adolescens | Adoleszenz |
| Adolf | Adolf |
| Adolf Eichmann | Adolf Eichmann |
| Adolf Frederik af Sverige | Adolf Friedrich |
| Adolf Hitler | Adolf Hitler |
| Adolf Rickenbacker | Rickenbacker |
| Adolphe Sax | Adolphe Sax |
| Adolphe-Charles Adam | Adolphe Adam |
| Adonis | Adonis |
| Adonis-slægten | Adonisröschen |
| Adoptere | Adoption |
| Adoption | Adoption |
| Adoptionisme | Adoptianismus |
| adoptivsøn | Adoptivsohn |
| Adour | Adour |
| Adrastea | Adrastea |
| Adrastos | Adrastos |
| Adrenalin | Adrenalin |
| Adrenokortikotropt hormon | Adrenocorticotropin |
| adressat | Adressat |
| adresse | Adresse |
| adressekort | Begleitschein |
| Adrian | Adrian |
| Adrian Belew | Adrian Belew |
| Adrian Petit Coclico | Adrianus Petit Coclico |
| Adrian Smith | Adrian Smith |
| Adrian Willaert | Adrian Willaert |
| Adriana Lima | Adriana Lima |
| Adriaterhavet | Adria |
| Adrien Brody | Adrien Brody |
| Adræt | Alarm |
| adskille | trennen |
| Adskillelse | Abteilung |
| Adskillige | Verschiedene |
| adsorption | Adsorption |
| Adult contemporary | Adult Contemporary |
| Advance Australia Fair | Advance Australia Fair |
| Advanced Encryption Standard | Advanced Encryption Standard |
| advare | warnen |
| advarsel | Achtung |
| Advent | Advent |
| Adventisme | Siebenten-Tags-Adventisten |
| Adventist | Adventisten |
| Adventistspejderne | Pathfinders |
| adventskalender | Adventskalender |
| Adventskrans | Adventskranz |
| Adventurespil | Adventure |
| adverbium | Adverb |
| advokat | Advokat |
