superlative

n. word denoting the highest degree of a quality (Grammar); something of superior value

adj. of the highest degree, supreme; denoting the highest degree of a quality (Grammar)

In grammar the superlative of an adjective or adverb is a form of adjective or adverb which indicates that something has some feature to a greater degree than anything it is being compared to in a given context. For example, if Adam is 45, Bess is 35, and Chris is 25, Adam is the oldest of the three, because his age transcends those of Bess and Chris in one direction, while Chris is the youngest, because his age transcends those of Adam and Bess in the other direction. If Dan, who is 50, and Edna, who is 20, join the group, Dan now becomes the oldest and Edna the youngest.
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n. superlative, word denoting the highest degree (Grammar)

adj. superlative, of the highest degree; denoting the highest degree of a quality (Grammar)

adj. superlative, supreme; denoting the highest degree of a quality (Grammar)