Substantive adjectives Latīna, Graeca as language names

1. What are examples of substantive adjectives?
2. What are substantive adjectives in Latin?

What are examples of substantive adjectives?

For example, in the sentence "there is a gulf between the rich and the poor," both "rich" and "poor" are substantive adjectives. Here, they refer to people rather than things.

What are substantive adjectives in Latin?

The word "substantive" comes from the Latin words sub + sto (stans, stantis...), and literally means "standing in place of." A substantive is an adjective that doesn't modify a noun, but replaces the noun: "The meek shall inherit the earth." "Meek" is an adjective.