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1.
The superlative form of beautiful. Referring the the single most beautiful person in existance.
Of all the people in the world, Melanie Marron is the beautifulest.
by thatswrite March 10, 2008
 
2.
More beautiful than anything and anyone in the world
Ali Is the most beautifulest girl in the world
by Eric Granger April 07, 2007
 
3.
The Slang word to describe how beautiful someone is when you can't quite put it into words.
"Lili, your the beautifulest person I know"

"Really? *cough* thats so *splutter* kind!, If I wasn't so sick I would throw myself upon you right now"

"Oh lili, I want to share everything with you, your toaster, fridge, even your contagious bacteria!"
by em696 February 17, 2010
 
4.
The most beautifulest woman in the world!
Blondie is the most beautifulest woman in the world!
by RABBIT73 January 09, 2009