Top Definition
1. A slang word used instead of the already slang "later". Used to pronounce one's leave or departure.

2. Catchphrase of a guy named Dai.
1. I'm going now, I'll cya laterness.

2. Guy1: You going dude?
Dai: Yeah man.
Guy1: Seeya.
Dai: Laterness.
by nobodyyoudknow July 30, 2006
1. A word used instead of 'goodbye' or 'see you later'. Mostly used online.

2. A word used to describe something to happen in the future.
1."Dude, I have to go now. Laterness." or "Yeah, I'm going to eat dinner. Laterness."

2. "I am going to brush my teeth in the laterness. But not right now. Yeah."
by Tony the Squirrel September 08, 2003
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