Yes, it is. It means functioning, capable of performing an action or operation.
Examples of words that function as a noun, a verb, or an adjective are:averagebettercounterexpressglassgreenhomelikepalepresentshorttime
Yes. An adjective is any word that modifies a noun or pronoun; this is the function of "important."
Yes, "different" can function as an adjective. In English grammar, an adjective is a word that describes or modifies a noun or pronoun. "Different" describes how one thing is not the same as another, making it an adjective.
"Big" is an adjective. It is used to describe the size or extent of something, such as in the phrase "a big house." It does not function as a verb.
Nope, it can actually be a sentence on its own.
"Lesser" can function as an adjective or as a comparative form of the adjective "little."
Habitual is an adjective.
Premature is an adjective.
Vertical is an adjective.
The word "sloppy" can function as an adjective.
The word "all" can function as an adjective, adverb, pronoun, or noun.
The word "cool" can function as an adjective or an interjection.
Pleasant is an adjective.
The word "disproportionate" can function as an adjective.
The word "personal" can function as both an adjective and a noun.
The word "extra" can function as an adjective or adverb.
Uneasy is an adjective.