Top definition
A substitute for an unknown number in algebra, as math teachers try to wean off their students from concrete to abstract thinking.
A litmus test in assessing a child's mathematical maturity is to look at her fluency in doing math with letters besides numbers.
via giphy
by MathPlus August 30, 2016
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2
A written symbol or character representing a speech sound and being a component of an alphabet.
Letters make up words.
by HT January 15, 2004
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3
an acient divice for communication that many teens have no idea of communicating with.
guy1:I should write a letter to my grandma.
guy2:Whats a letter
by mmann April 10, 2009
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4
The letter V, which shows up on your college application indicating that you played Varsity for any sport (with those levels) at your high school. Very helpful for getting into a college, and may be help with the girls too.
Did you get that letter?

Yeah, now I can get into a better college.
by Anonymous November 16, 2004
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5
n. An old person's excuse for e-mail.
"Hunny, did you get my letters?"
"No G-ma, I've been checking my computer for weeks and they still haven't shown up. Maybe the server is down..."
by RobertOldhead September 25, 2008
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6
refering to boob size.
girl 1: what size are your letters?
girl 2: D
girl 3: I HAVE NO LETTERS!
by la-sha-sha April 09, 2010
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7
Part of a ciggarete where the manafacturer's logo is printed
"Lets have some of that fag"
"No Mate"
"Come on boss save me letters"
"O.K"
by seano100 January 05, 2006
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