Smaller groups or parts of a larger organization.
Suborganizations are like little teams inside a big team.
Examples:
The school has many suborganizations, like the drama club and the science club.
Each suborganization has its own leader.
The suborganizations work together to make the school better.
The suborganizations are like different kinds of fruit in a big fruit salad.
In a big company, there are many suborganizations, like the sales team and the marketing team.
The suborganizations are like different colors in a big painting.