superlative meaning
EN
[suːˈpɜː.lə.tɪv] [sjuːˈpɜː.lə.tɪv] [suˈpɝː.lə.tɪv] 
US WSuperlative
- In grammar, the superlative is the form of an adverb or adjective that of the adverb or adjective being used that is greater than any other possible degree of the given descriptor. English superlatives are typically formed with the suffix -est (e.g.
FR superlative 
- NounPLsuperlativesPREsuper-SUF-ative
- The highest extent or degree of something.
- (grammar) The form of an adjective that expresses which of several items has the highest degree of the quality expressed by the adjective; in English, formed by appending "-est" to the end of the adjective (for some short adjectives only) or putting "most" before it.
- The superlative of "big" is "biggest".
- (informal) An adjective used to praise something exceptional.
- Daniel is amazing, wonderful, fantastic, and many other superlatives I can’t think of right now!
- The highest extent or degree of something.
- Adjective
Definition of superlative in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Uncomparable adjectives
- Uncomparable adjectives
- Nouns
- Countable nouns
- Countable nouns
- Adjectives
Source: Wiktionary
Grammatically, this word "superlative" is an adjective, more specifically, an uncomparable adjective. It's also a noun, more specifically, a countable noun.