Fourth letter in Greek alphabet, the word Delta means a change in quantity (more rarely quality).
Take the value for the first day of each week and subtract it from the value at the next to obtain the weekly deltas.

Rates have gone up, but I converted to fixed, so my Delta hasn't been too bad.
by southernravin July 31, 2006
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1. A woman of Delta Sigma Theta Sorority Inc., founded in 1913 at Howard Univ.
I went to a Delta stepshow and they were great!
by Nikki G. December 15, 2003
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insanely cool; hardcore; amazing; tight; fun
"Dude, did you really just ace that calc test? You are so delta!"
by Nick Jonas April 07, 2008
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noun: a very selfish and disgustingly ugly girl who resembles the upper part of the human ass crack and who shows no concern for anyone around her because she is fat but thinks she is beautiful. many of the common signs that a girl may be THE DELTA is that she is a very fast driver and complains about everything.
THE DELTA was talking shit about an ugly girl and said to the person sitting next to her "thank god i'm not as ugly as she is!" then the person responds "you're looking in the mirror."
by DUMPSNEEDNOTAPPLY April 22, 2010
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A member of the illustrious organization of Delta Sigma Theta Sorority, Incorporated. A woman who values scholarship, service, and sisterhood above all. A women who loves Crimson and Creme, Elephants and is never afraid to speak her mind, serve the community, or handle her responsibilities.
A member of the largest and most respected sorority in the NPHC.
"On my campus, Delta runs the yard. They have the best programs, step the hardest, and are the most down to earth"
by H B March 04, 2006
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1:word D from the greek alphabet that look like this(Δ),and lower case looks like this(δ,𝛿)
2:plane service company
3:counter terrorist group from usa
4:kool codename
not a name
i like this thing Δ
guy who watch too much MLG:illuminati confirmed
me:dude thats delta from greek alphabet
by Player2170(roblox arsenal guy) December 06, 2019
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