superlative

Short definition from Wiktionary

Adjective

1. 1
   Having the power to carry something or someone above, over or beyond others.
2. 2
   Exceptionally good; of the highest quality.
3. 3
   Of or relating to the superlative degree (a degree of comparison of adjectives and adverbs).

Noun

1. 1
   The extreme (e.g. highest, lowest, deepest, farthest, etc) extent or degree of something.
2. 2
   The degree of comparison of an adjective or adverb used when comparing three or more entities in terms of a certain property or a certain way of doing something. In English, the superlative of superiority is formed by adding the suffix -est or the word most (e.g. tiniest, most fully); the superlative of inferiority, by adding the word least (e.g. least big, least fully).
3. 3
   An adjective or adverb in the superlative degree.