A pre-modifier and adjective. Indeed, superlative is a type of adjective but is here modified itself to create a more educated sounding word, and for absolutley no other purpose whatsoever. As such, it describes another adjective as being the greatest of its kind, ie sexy becomes sexiest, and fat becomes fattest. Fattest and sexiest are in themselves regular superlatives requiring no pre-modification, however, superlatively describes a descriptive adjective like sexy or fat to mean that the object being described is the most extreme of its field, be that field sexyness or fatness.
"I love you honey, you're so superlatively sexy"

"You superlatively cocky bastard!"
by No Name Johnny June 5, 2006
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The highest kind, quality, or order; surpassing all else or others; supreme.
“The dictionary defines superlative as 'of the highest kind, quality, or order; surpassing all else or others; supreme.' I define it as Dwight Schrute. As a sales executive, as a leader, as a man, as a friend. He is of the highest kind, quality, and order, supreme.”. - Michael Scott
by yrnvav May 4, 2018
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An illness resulting in delusional and condescending remarks about everything you do being better than everyone else.
"Last night we went to THE best sushi restaurant, sensational food, just incredible! Much better than anything you've ever had".

"Wow, you have a serious case of superlativitis!".
by Chutzpanit September 19, 2016
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A state of being, like terrific, fantastic, excellent etc.
"How are you Dave"
"Superlative thanks Joan, yourself?"
"You're a wanker Dave."
by SDB January 10, 2005
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The dictionary defines superlative as of the highest kind, quality, or order, surpassing all else, or others. Supreme. But I define superlative as pia. As a friend, as a wife, as a girlfriend,as a human. She is of the highest kind , quality and order.
My wife is superlative in every way possible
by Thepunixher July 27, 2019
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The mental state of hallucinating due to lack of sleep
Everything is superlate funtime because I haven't slept in 3 days!
by Gushnahalla June 29, 2010
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