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1.
adj. That which is first, foremost, or central.

n. The primary one of a group.
You must complete primary school before you may attend secondary school.

A secondary planet orbits a primary.
by Downstrike May 23, 2004
 
2.
Verb. Usually as "to primary." To propose a challenger candidate against an incumbent politician during the primary and then do everything you can to insure the neophyte challenger is victorious over the incumbent. Thus, the incumbent becomes a regular citizen again and is free to pursue the rest of his or her political ambitions overtly bought out as a lobbyist or Washington attorney. This is the tool of last resort when a politician no longer represents the interests of his or her constituency, but of a special interest or heavy-hitting contributor that overshadows the will of the people back home.
I promise to primary any politician who votes against Social Security, Medicare, or Veterans' Benefits.
by Hot East April 12, 2013
 
3.
The main woman or man that an individual is dating.
Yo dhat ho is not da primary, he got a biotch at home
by nyc nice February 04, 2007
 
4.
Avatar® course jargon.

The designer of the Avatar® Course defines a primary as "a creation or communication invested with sufficient intention and effort to create a reality."

So what is your primary? What reality you want to create?
by Ronald R.J. Cools December 16, 2007