Definition of "ad-" in English

prefix

1. (no longer productive) Doing, enacting, forming a verb.

   • accouple
   • admarginate
   • admixture
   • attune

2. Near, close to, adjacent.

   • adaxonal
   • addental
   • admedial

3. Towards in direction or movement. (anatomy) Towards the midline of the body.

   • adapical
   • adfluvial
   • adgerminal

4. (no longer productive) Intensifying, additionally.

   • acclaim
   • adsignification
   • adspection

5. Along, alongside.

   • admarginal
   • adnervular
   • adstratum

6. Appending and/or prepending. Adding from either side.

   • adfix
   • adposition
   • affix

7. Modifying.

   • adnominal
   • adverb
   • assoil

8. Atop or above in position.

   • adatom
   • adcumulate
   • aggrade