| Active Server Pages | Active Server Pages |
| ActiveX Data Objects | ADO |
| activist | aktivist |
| Activity-based costing | Activity-based costing |
| actor | skuespiller |
| Acts of the Apostles | Apostlenes Gerninger |
| actual | virkelig |
| actually | egentlig |
| Actvity | Aktivitet |
| acupuncture | akupunktur |
| Acuse | Angive |
| Acute Viral Nasopharyngitis | Forkølelse |
| Acyl chloride | Syrechlorid |
| ad | annonce |
| Ad break | Pub |
| Ad writer | Tekstforfatter |
| Ad-supported computer software | Adware |
| Ada | Ada |
| Ada Lovelace | Ada Lovelace |
| Ada of Caria | Ada |
| Adad | Adad |
| Adalbert of Hamburg | Adalbert af Bremen |
| Adam | Adam |
| Adam and Eve | Adam |
| Adam Copeland | Adam Copeland |
| Adam Darski | Nergal |
| Adam Gottlob Oehlenschläger | Adam Gottlob Oehlenschläger |
| Adam Ludwig Lewenhaupt | Adam Ludwig Lewenhaupt |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam of Bremen | Adam af Bremen |
| Adam Sandler | Adam Sandler |
| Adam Smith | Adam Smith |
| Adam Weishaupt | Adam Weishaupt |
| Adamawa | Adamaoua |
| Adamawa Emirate | Adamaoua |
| Adamawa Plateau | Adamaoua |
| Adamawa Province | Adamaoua |
| Adamello-Presanella | Adamello |
| Adams-Onís Treaty | Adams-Onis traktaten |
| Adana | Adana |
| Adana Province | Adana |
| Adansonia | Baobab |
| Adansonia digitata | Baobab |
| adapt | indrette |
| adaptation period | tilpasningsperiode |
| Adaptator | Adapter |
| Adapter | Adapter |
| Adapter pattern | Adapter |
| add | addere |
| add fuel to the fire | puste til ilden |
| add insult to injury | føje spot til skade |
| add up | addere |
| Adda River | Adda |
| Adder electronics | Additionskredsløb |
| Addiction | Narkoman |
| Adding-up | Addition |
| Addis Ababa | Addis Ababa |
| addition | sum |
| Addition in N | Addition |
| additional | øvrig |
| additional packaging | yderligere emballage |
| Additionnaly | Videre |
| additive | tilsætningsstof |
| address | adresse |
| addressee | adressat |
| Adelaide | Adelaide |
