surpassing all others; of the highest degree
He spoke with superlative ease
in grammar, denoting of or constituting the degree of comparison expressing an extreme or unsurpassed level or extent: compare comparative1 (3)
The superlative of ‘hot’ is ‘hottest’
superlatively adv
superlativeness noun
[Middle English superlatif via French from late Latin superlativus, from Latin superlatus, past part. of superferre to carry over, raise high, from super- + ferre to carry]