2. Expressing the highest or lowest degree of the quality, manner, etc, denoted by an adjective or an adverb. The superlative degree is formed from the positive by the use of -est, most, or least; as, highest, most pleasant, least bright. Superlatively, Superlativeness.
Origin: L. Superlativus, fr. Superlatus excessive, used as p.p. Of superiorferre, but from a different root: cf. F. Superlatif. See Elate, Tolerate.