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20.
1. Used by both n00bs and true 1337s alike in order to convey their h4x0rz 5k1lz in a particular medium, primarily video and computer games. Its usage has become widespread, and now includes, but is not limited to, sports, sex, fighting, driving and eating. Essentially a synonym for "good."

2. An integer between the number 1336 and the number 1338.

3. The year that marked the beginning of the Hundred Years' War between two houses of the European nobility. These consisted of the House of Valois, who claimed the title of King of France, and the Plantagenets from England, who claimed to be Kings of France and England. Contrary to the implications of the name, the war lasted 116 years, ending in 1453.
1. z0mg m8 t4ht h4x0rz iz t3h 1337!

2. Guy #1:I'm thinking of a number between 1336 and 1338. What is it?

Guy #2: That's easy, you fuckwit. It's 1337.

Guy #1: Unfortunately for you, I didn't specify whether the number was an integer or not. I was, in fact, thinking of the number 1336.77389.

3. My favourite war is the Hundred Years' War, beginning in 1337 AD.
by Rob Knight May 30, 2008
 
1.
Hacker "Sp33k" for leet, or elite. Originating from 31337 "eleet", the UDP port used by Dead Cow Cult, a hacker group, to access Windows 95 using Back Orifice, a notorious hacking program.
1337 h4x0rz pwn j00!
by Cal Webster April 24, 2003
 
2.
n. 1. Nestled between 1336 and 1338, 1337 is commonly known as a number, or for the more advanced; an "integer"
2. Often misused to satisfy a lamen's ego, the self-proclaimed 1337 will misuse the title, pretending to hold Xtr3m H4x0r capabilties while in fact masturbating to preteen beastiality at 2:00 AM with baggy eyes; anonymously hassling n00b's with better things to do than kill their babies over mindrot such as Everquest and Warcraft. See also "colon debris" and "queefstain"
"i t0tally pnwed u. u r so a n00b and i am so 1337"
by PoonPieHouligan August 17, 2003
 
3.
A language in which numbers and symbols are put together to look like letters. Some people create their own 1337 letters and it makes them look more 1337 by fellow 1337-speakers. Here is an alphabet of 1337 letters I know and have created:

A: 4 or l\ or ^ or @ or /\ or /-\
B. l3 or 8 or ß or ]3 or l:
C: ( or < or © or ¢
D: l) or l> or ])
E:3 or £
F: l= or # or ƒ
G:6 or 9
H: # or l-l or (-) or !-! or }-{ or }{ or l+l or )+( or !+! or }+{
L: 1 or ! or ]
J: _l or _/
K: l< or l( or l{ or l<=
L: l_ or ! or 1
M: l\/l or /\/\ or l\l\ or ^^
N: l/l or /\/
O: 0 or () or <> or * or ø or Ó or °
P: l* or l> or |D or l^ or l+
Q:& or (\) or ¶
R: l2 or ®
S: 5 or $ or §
T:+ or 7
U: l_l or /_/
V: \/
W:|/\| or \/\/ or |/\/ or \/\|
X: >< or }{ or :-:
Y: ¥
Z: 2
()/\/\9 7^l+l+ 15 73)-( 1337 #l\:-:<>l2 1 +()l_l> _/<>* ^l3°l_l+ /\/\3}-{ #1213l/ll>!!!1!!11!1!! )+(3 |D\l\/l/l2.

translation:Oh my god that is the leet hacker I told you about my friend! He owns.
by finity July 09, 2004
 
4.
one thousand three hundred and thirty seven

(i do know the true meaning)
guy: i am 1337!!
me: you're a number??
by matt March 03, 2005
 
5.
Once used by the hacker community as sort of a sub-culture language, ANYONE using this type of speak in the present day in age is either:

A) A clueless net newbie who somehow thinks its still "cool" to speak this way.

B) A veteren net user who uses it to parody the type of people mentioned in example A.
u r n0t 1337 d00d!!11
by Lord Requiem November 14, 2002
 
6.
1337 is the language of hackers and newbies across the internet. Also, the words in 1337 are usually short(ie "are" becomes "r") and intentionally spelt wrong(ie "the" becomes "teh", this is most common with e switching places and o's becoming p's)

the mostly complete translation chart(exluding unicode characters, ie ©):
A=4 /-\ @ ^ /\
B=8 ]3 ]8 |3 |8
C=( {
D=) } |) |} |> >
E=3
F*=# |=
G=6 9 (_>
H=# |-| (-) )-( }{ {-} /-/ \-\
I=1 !
|
J**=_| j
K=|< |{
L=1 |_
M=/\/\ |\/|
\/
N=/\/ |\| \
O=0 ()
P=|D |* |>
Q=0,
R=|2 |? |-
S=5
T=7 + ']'
U=(_) |_| \_\ /_/
V=\/
W=\/\/ |/\|
/\
X**=>< }{ X
Y='/ %
Z**=2 z

Common mispellings:
the = teh
that = taht
take = taek
own = pwn
you = joo
dude = jood

common phonetic replacements(always used in true 1337):
f = ph
ck == xx

*there is no 'F' in true 1337, it is replaced by the 'ph' phonetic in true 1337

**acceptable when not replaced by a symbol
_|00 |2 4/\/ |_||\|1337 (_)83|2 |-|4><><0|2

Translation: You are an unleet uber hacker
by Amnesiasoft October 26, 2004
 
7.
1337. Originally used by hackers to avoid simple net searches that would turn up, for example, "I am an elite hacker".

Instead hackers would say "1 4|\/| 4|\| 31337 |-|4x0|2".

"31337" was later shortened to "1337".

Now 1337 used mainly by the gaming community (also in chatrooms) to mean an especially skilled player.
1. 7|-|3 |=|31 15 93771|\|9 (|053 70 7|-|15 31337 0p3|24710|\|!

2. im s0 1337 taht i pwn ur @ss n00b!
by Grakkar April 22, 2004