'superlative degree' definitions:

Definition of 'superlative degree'

From: WordNet
noun
The superlative form of an adjective or adverb; "`fastest' is the superlative of the adjective `fast'"; "`least famous' is the superlative degree of the adjective `famous'"; "`most surely' is the superlative of the adverb `surely'" [syn: superlative, superlative degree]