Superlative (su per-la-tive) adj., 1.) of, relating to, or constituting the degree of grammatical comparison that denotes an extreme or unsurpassed level of extent.
Superlatives are either marked by the suffix –est, or preceded by the words most or least. It should be noted, not all adjectives and adverbs have superlative forms.
She has the biggest hair I have ever seen.
Say What You Mean. Mean What You Say. Know what you’re writing.