Superlative comes from Middle English superlatyf, from Old French superlatif, from Late Latin superlātīvus, from Latin superlātus (“carried above, over; extravagant, of hyperbole”), past participle of superfero (“carry over”), from super ("above") + fero ("bear, carry"). 

The earliest known use of the word superlative is in the Middle English period (1150—1500). OED's earliest evidence for superlative is from the 14th century, around 1400.  In grammar, the term "superlative" refers to the highest degree of comparison for adjectives and adverbs, indicated by adding "-est" or using "most" or "least". 

Examples of "superlative" used in a sentence: 
"The view from the top of the mountain was superlative." 
"He delivered a superlative performance in the play." 
"The judges found it difficult to pick the person with the superlative performance in the talent show." 
"A superlative in English describes something that is at one extreme or the other." 
"Lord Chatham used words equally superlative." 
"He was beginning to doubt his superlative detecting skills when it dawned on him that she might be using a maiden name."
"In other words, these wines may offer investment opportunities for wine collectors…or just a superlative wine to be enjoyed later if one has patience and fortitude."

Just the facts:

SUPERLATIVE Definition & Meaning - Merriam-Webster

SUPERLATIVE Synonyms: 166 Similar and Opposite Words | Merriam-Webster Thesaurus