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Figurative - A foundation, basis or support.

Stone which lies at the corner of two walls and unites them; implies a sense of foundation in that the building would fall to ground without the cornerstone.
"This law is implicit in earlier work, but Lavoisier stated it explicitly and used it as the cornerstone of his science."

"Yoga and meditation were the cornerstone to the success of the state ranker."
by K****h4u February 18, 2019
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Aug 4 Word of the Day
Man's greatest invention, brain bleach removes bad memories and general DO NOT WANT moments. Every household should have a few gallons.
1: Dude, I just walked in on my parents.
2: Have some Brain Bleach!
by Andikun November 06, 2007
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2
When you get intoxicated to break through a sexual inhibition—like when pot helps you “turn a corner” sexually.
Carly wanted to do her new boyfriend Mike, but she just couldn’t do it until she got cornerstoned.”
by Ren, the Ambivalent One February 23, 2009
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3
On Route 1 in College Park, MD, the Cornerstone Bar is the most popular hang out for the college kids who attend the University of Maryland, College Park. Located at the corner of Route 1 and Knox Road, Cornerstone is a mecca of drunk college kids on the weekends.
let's go to Cornerstone tonight, I'm tired of these frat parties.
by JohnDoe12345 September 15, 2005
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4
The upper section of the abs usually shown when a guy pulls his shirt up to entice females to increase chances of a sexual encounter.
When i show these bitches my cornerstone it's going to be on like donkey kong!!
by V.T. Lucero July 27, 2011
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5
a christian music festival where you go to meet up and have sex with people you have met on the internet
"Jesus4life2512-i can't wait to met you at cornerstone and watch Emery with you"
"xXxTinityRawksxXx-i know, i feel like i've known you forever..."
by pinkeye January 27, 2005
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