base
foundation; bottom part of a structure or object
La base de cette tour est très solide.
The foundation of this tower is very solid.
the basics; fundamental principles or essential knowledge
Connaître la base du sujet est indispensable pour avancer.
Knowing the basics of the subject is essential to move forward.
installation or site used as an operational centre (e.g., military, research, logistical base)
L'armée a installé une nouvelle base près de la côte.
The army has set up a new base near the coast.
base (chemistry): a substance that can accept protons or donate electron pairs; opposite of an acid
Cette solution est une base et neutralise les acides.
This solution is a base and neutralizes acids.
database; dataset (informal short form for 'base de données')
J'ai ajouté tous les contacts dans la base de données.
I added all the contacts to the database.
