This is the 1006th most frequent French word.
collective
A group or entity formed by individuals working together toward a common goal.
In this case, 'collectif' is used as an adjective to describe work done jointly by a group of individuals.
Le travail collectif permet de partager les responsabilités.
Collective work allows sharing responsibilities.
In this sentence, 'collectif' acts as a noun referring to a group of people working together for a common purpose.
Nous avons décidé d'unir nos forces pour le bien du collectif.
We decided to join our forces for the collective good.
Here, 'collective' is an adjective describing the decision made by the group as a whole.