1) ADJ: ADJ n You can describe things that are related to the digestion of food as digestive.

...digestive juices that normally work on breaking down our food...

Peppermint oil is very good for regulating digestive disorders.

2) N-COUNT A digestive or a digestive biscuit is a type of biscuit made from wholemeal flour. [BRIT, TRADEMARK]

English dictionary. 2008.