3
(Read: two point oh | two point zero)

Marketing catchphrase/buzzword than, when attached to a name, implies an "improved" or "superior" product than it's predicesor.

When used in comparisons like ' A is B 2.0" ,' it's like saying "B" is like "A" only "better."
SUVs are station wagons 2.0.

George Bush and Osama bin Laden think they're Jesus Christ 2.0.
by Man Machine August 12, 2007
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4
the number before 21 and after 19. generally used when counting.
"i can count to twenty!"
"twenty is my favorite number."
by Room-101 February 07, 2004
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5
The age where the bouncer stops asking for your fake ID.
Seven-foot-tall gentleman whose name is Tyrone: "Yeah, you can come in."

Me: "Uh, you sure? You don't want to see my license?"

Tyrone: "You're 20, no one gives a shit."
by Twenty Years Old, Still Virgin January 26, 2013
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7
part of a series of '10-codes' that many security officers & law-enforcement-types use, the '10-20' code refers to receiving a location coordinates from a second party at the other end of the line (over distance radio transmission). '10-4'- meaning that the transmission has been received.
"Soldier.. what's your 10-20?" often shortened to: "what's your 20?"
by xyzzy รซLยงรฎX November 11, 2002
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