Definition from Wiktionary, the free dictionary
prerequisite (not comparable)
- See also Wikisaurus:requisite
prerequisite (plural prerequisites)
- Something that must be gained in order to gain something else
- Having a decent qualification is a prerequisite to getting a good job in marketing.
- In education, a course or topic that must be completed before another course or topic can be started. May be colloquially referred to as a prereq.
- Algebra is typically a prerequisite for physics.
Related terms 
Something that must be gained in order to gain something else
In education, a course or topic that must be completed before another course or topic can be started
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