Based is used with a location and is defined to show where something is situated.(suffix)
An example of based is to add it after the word "London-" to show that a company has headquarters in London.
The definition of based means having something as its major element.(suffix)
An example of based used as a suffix is in the phrase "milk-based," which means a product that has a significant amount of milk in it.
See -based in Webster's New World College Dictionary
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