n: a unit of measurement used to describe a dose of radiation. A single rad is equivalent to 100 ergs per gram or 0.01 joules per kilogram of irradiated substance.
The Federally-defined maximum occupational radiation dose is 5 rads per year.
by Ten Second Tom September 29, 2005
a flippant and off hand way to refer to something as being cool, awesome or otherwise great.

Commonly used in the 80's but is experiencing a resurgence particularly from the hipster fixed gear bike scene.
1. "Man, that Pista would look totally rad with a tri-wing aerospoke."

2. "Dude, did you see that guy getting totally rad on his fixie, that 180 bunny hop was off the hook".
by TheRadness November 17, 2008
Something that is cool, or very neat.
"That movie was rad!"
by Paige October 01, 2002
it's like saying über cool.
talk like a skater from the 80's,
say rad.
by enameline September 11, 2005
1. An over-used adjective that people often use when they are trying to seem cool.
2. The cute term for a radish.
1. Dana: Sharon, your shoes are so cute!
Sharon: Yeah, they're pretty rad if I do say so myself.
2. Those rads taste so bitter.
by KellBell955 October 14, 2008
awesome; cool usually surfer slang
surfer guy just nailed a wave

"dude that wave was so rad!"
by big booty. May 29, 2006
A totally rad 80's movie about BMX racing featuring that hot chick from Full House
-Have you seen that rad movie Rad?
-It's totally rad.
by Jared December 18, 2003
When awesome and cool just aren't enough to describe something.
Aj: "We're awesome!"
May: "No we're not, we're better! We're fucking Rad maan!"
by MerMaydens February 07, 2014

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