1. (among trekkies) A fan of the television program Star Trek: Deep Space Nine.
2. A Star Trek Fan who believes Deep Space Nine is the best Star Trek.
Bill's such a niner, he never takes off his Bajoran earring.
by Jonah C July 26, 2006
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Niner is a rite of passage ceremony marking entrance or acceptance into a group or society in High School, required for grade nine students to be fully "accepted" into the student community.
Another word that could be used for this term is Initiation. However niner is a more specific term referring only to grade nine initiations.
This type of initiation is mostly done in school trips that require students to sleep over,(for example; Muskoka Woods camp) and at night around 1:00 to 3:00 AM, grade 11 or 12 students would wake up, and go around "initating" niners in their sleep.
This term is a new type of initation, started in Bishop Allen Catholic High School, in Toronto, Ontario, Canada.
The following could be considered ninering, having your hair sprayed into a vivid color, usually green, having shaving cream sprayed on your face, or make you do ridiculous things (if not in a school trip.)
by Gman_0000 September 12, 2007
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A word used to point out 9th graders
9er(niner):''Hey, whats up? do u think i could get your e-mail?''
12th grader: ''But you're a 9er''
by me12345 August 3, 2005
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Niner is a versatile word that can basically mean any word that you didn't feel like trying to think of at the moment. It can also be an exclamation, an insult, or a substitute for a name. Alternate spelling: 9er
"Niner!"
"Hey 9er what's up?"
"Hey look at that 9er over there!"
"Could you hand me that niner?"
"Cripes you're such a niner."
"Studies show that these 9ers (point to something) have significant migration during the winter."
by Lauren Shores February 17, 2005
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1. A great amongst greats, a god amongst men-- a member of the San Francisco 49ers, the only team to win at least 10 regular season games for 14 straight years, and one of three teams to win the super bowl five times.

2. a 9mm pistol
1. The incarnation of God on Earth, Joe Montana, was a niner. So was Jerry Rice, Roger Craig, Tom Rathman, Ronnie Lott, John Taylor, Steve Young, and a host of other players. Alex Smith is the niner who will lead the niners back to glory.

2. A cop tried to shoot a niner with a niner, but Joe Montana intervened and saved the niner.
by harry_pothead16to80 September 20, 2006
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A fan of the television show "Star Trek: Deep Space Nine"
Don't call me a Trekkie, I'm a Niner. The rest can die in a fire.
by BlablablablSteve September 2, 2008
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