Perhaps it is easier to say what spirituality is not. It is not the following, though they can flow from it and are a necessary expression of it:-
Active works of service to others.
Social gatherings and leisure activities.
Our daily work.
Intellectual study about spirituality or metaphysics.
So what's left?
Individual connecting with God.
Corporate connecting with and sharing in God.
The individual connection must come first. One cannot forever ride passenger on the faith of others: sooner or later the individual must take responsibility for a personal connection with God.