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A celebrity is someone who is popular and is usually in entertainment industry. Celebrity can also be used for people in other fields like scientists, doctors, fashion designers, writers who are usually at the top of their field and like to give interviews to the media and usually have a relatively strong social presence compared to other top people in their field. Celebrities usually have a dedicated fan base.
1. Johnny Depp is a celebrity.

2. Stephen Hawking is a celebrity scientist.

3. John Grisham is a celebrity author.

4. Justin Bieber and Rebecca Black are celebrities.(unfortunately)
by notacelebrityyyyyyy July 10, 2011
Anyone with a Simpsons caricature.
Mel Gibson officially became a celebrity with his appearance on The Simpsons...
by Sammy Collin April 05, 2008
Someone who gets to ride around in a Zamboni.
My definition of a celebrity:Someone who gets to ride in a Zamboni.
by LoveStruck69 April 29, 2011
The tards flapping about on MTV, admired by girls aged 11-18 and anyone else with their mobile phone up their ass. Nobody should be obsessed over celebrities and if they are they are either a) a girl or b) a sped.
If you watch E! News, TRL (Total Retard Live) or anything to do with MTV other than programs that actually play music (and Beavis and Butthead - they rule) then you are a turd and should burn.
by Didda Tinkle May 21, 2004
A person who works hard to become well known, then wears dark glasses to avoid being recognized and complains when asked for an autograph.
A celebrity is one who is known to many persons he is glad he doesn't know.

— H.L. Mencken
by mrxskull June 27, 2013
Someone who makes a fortune singing, acting and dancing yet posesses absolutley no talent in any of these fields.
Jessica Simpson, Jessica Simpsons celebrity sister Ashley, Britney Spears, Paris Hilton, etc...
by 44 September 02, 2006
A sparkling weasel-like creature that you often see in a movie or television show. But most of the time they're just trying to pretend they're someone else. Mark Hamill (an older celebrity) thinks he's a galactic Jedi warrior. Arnold Schwarzenegger (the longest name in the English language) thinks he's a robot from the future sent back to kill Sarah Connor. And, perhaps most bizarrely, Kristen Stewart (A.K.A. KS Bot 3000) thinks she's a rape-piñata for a werewolf and a vampire. They inhabit many places in the world, but most exist in Los Angeles, California, for a reason that has not yet been determined.

Plural-Celebriti (as in octopi)
Chris: "Hey, do you want to drive up to Los Angeles for the weekend?
Tom: "No way, dude. That place is crawling with celebriti."
Chris: "Oh, yeah. Last time I saw a celebrity, it had a crowd of venomous leeches swarming around it, frantically taking pictures."
Tom: "Haha, I'm so glad we're not celebriti."
Chris: "Totally."
by PearlJam24 November 23, 2013