First and Prefatory

First adjective - Coming before all others in time or order.

Prefatory and first are semantically related. In some cases you can use "Prefatory" instead an adjective "First".

Nearby Word: firstly

Prefatory adjective - Coming before the main part or item usually to introduce or prepare for what follows.

First and prefatory are semantically related. Sometimes you can use "First" instead an adjective "Prefatory".