Hi-Def 

A polite way of greeting a hearing impaired individual.

"Look, there comes old Mrs. Danielson. The poor thing just can't hear anything anymore. Hi-Def!"

"That filthy old man has been sitting on the street for so long that his darn ears have done rotted plumb off. Hi-Def!"

"Hey that's Pete Townsend over there, isn't it? Hi-Def!"

Hi-Def by www.babysue.com January 2, 2009

hi-def 

Awesome, Super Cool, Sweet

I jst banged your Super Model mom, it was so hi-def

hi-def by Tevin Kripke March 6, 2005

hi-def 

A short-saying for high-definition.

Aww snap, dawg, that's a hi-def T.V.!

hi-def by Lars March 2, 2005

hi-def 

1.being really fresh, cool, or noticable in a popular or in attractive clothing.
2.well known and respected.

louis vuitton bag, gucci shoes, and polo shit he's in hi-def right now.

hi-def by Universal The Untouchable February 19, 2008

Hi-Def 

An excuse to buy a new TV.

Sure my TV is nice, but it's not hi-def.

Hi-Def by Something915 December 20, 2008

hi-def 

A stronger form of def (definitely). Pun on Hi-Def T.V.s

"You're coming, right?"
"Hi-def, shorty."

hi-def by Blibnick October 30, 2006

hi-def 

The state of being so high, usually on marijuana, that the stoner becomes deaf. Often associated with being so absorbed watching HDTV that everything else is ignored. Inspired by a high deaf kid who gets deafer as he gets higher.

Peter was so hi-def that he couldn't even hear the police siren as they pulled up to arrest him for dealing hella-weed.

hi-def by Powderhead November 20, 2007