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9.
Short for "Definitely"
- "Sometime in the future, we're going to that Harry Potter amusument park."

- "defs!!"
by letsTPtheplace July 07, 2010
 
1.
def
def /def/ adj. to describe a person, thing, or event that is cool. iarchaic, circa 1981/i
"yo, mah pizzles, I got da hook-up at this def new club. It's suppose ta be off da hizzy"
by Jay January 19, 2003
 
2.
def
It means like terrific or great or excellent
"I bet you were def." ~Fresh Prince Of Bel Air when he's talking to Ashley about her singing. 1st episode
by Lady_Rae_Marie January 11, 2006
 
3.
def
Def ain't short for Deffinitly.

Def means cool, ill, dope. You know.
Yo man Bone Thugs N Harmony are one of the most def groups of all time.
by some polak September 17, 2004
 
4.
A short form for the word definetly.
"I'm defs keeping this on the DL."
"Are you going to John's tonight?" - "Defs."
by coolkidddd September 12, 2006
 
5.
A shortened word for definitely
She is defs the hottest girl out
by cwbam October 03, 2011
 
6.
n. An abbreviation of "definitely"
The Asian girl asked, "What's your fav. position?"
Digitus answered, "Def. the doggy-style... Do you wanna do it?"
The Asian girl replied, "Nah, later maybe. I mean we just did in the forest this morning! We should not do it for a couple of days."
Digitus replied, "You're right. Do you want to watch some TV?"
The Asian girl answered, "Yeah."
They sat down as they turned on the TV.
by Digitus July 07, 2005
 
7.
def
Can be short for definitely or definition. It can also be used to emphasize a word such as something is really cool or really not cool, etc.

(orgin well the celtic swim '06-07 team can take credit i guess)
Gouge Vomit Burn is the def. of sick nasty. (definition) That's def going to happen. (definitely) Are we going to have a dance party later? Yeah def!
by Celtic Swim '06-07 January 28, 2007