What does the word prerequisite mean?

"Prerequisite" means something that is required beforehand. It's something you need to have or do before you can do something else.

Here are some examples:

* "Passing Algebra is a prerequisite for taking Geometry." This means you have to pass Algebra before you're allowed to take Geometry.

* "A college degree is a prerequisite for this job." This means you need a college degree to be considered for the job.

* "Having a driver's license is a prerequisite for renting a car." You need a driver's license to rent a car.

Essentially, a prerequisite is a condition that must be met before something else can happen.