1. To be comfortable
2. To be soft or fluffy

British form of the word cozy
That bed looks nice and cosy.

This is a cosy jumper I have on.
by BuhBoyle March 15, 2006
Refering to a girl, The best friend you will ever have. She's hilarious and beautiful and kind. She has a beautiful voice and lives cats and tea. a total sweetheart.
"She is my bestfriend."
"Who is she?"
"Shes my Cosie"
by somechickyouproboblyydontknow. December 15, 2014
cosi is name shortened from cosima, it describes a attractive and sexual women who is very very very funny and good with boys
damn, cosi is good with boys, wish i was as confident as her
by djdjdjjdjdjdjdjdjdj July 10, 2011
1. Stew and dumplings on a cold day.

2. Tucked up in bed with your partner.

1. My my its cold outside, i need some cosy food.

2. I love being cosy with you Steven.
by miss carebear April 10, 2009
A salad, sandwich, and coffee bar. Located in very few locations including Bryn Mawr, PA and New York, NY. Serves the most AMAZING fat free mango manias, bread, and chicken ceaser salads. The Bryn Mawr location is filled with kids from the surrounding private schools including The Baldwin School, The Shipley School, and The Haverford School. Locals are bound to see at least one familiar face in the restaurant or in the always packed parking lot. Main Line mothers are often seen inside toting chanel handbags and young children while they order take-out for their family dinner. Groups of kids, in North Faces, Birkenstocks, Polos, and cell phones glued to their ears, wait in the salad line talking obnoxiously. An extremely popular restaurant that is sure to become nearly as contagious as Starbucks. The New York locations are not nearly as busy as the Bryn Mawr location. And the customers are less suburban. Diners at the NY locations are usually business men and women in suits- yuppies no doubt. COSI- THE BEST SANDWICH AND SALAD BAR EVER!
If you've never been to a Cosi...GO! The bread is UNBELIEVABLE!

Reasons to go to Cosi:

The best bread in the world...BY FAR!
Spectacular people watching
Convenience is key
can be a nickname for Constance. Something shorter and easier to remember. Far more interesting than Connie.
Person: oh hi whats your name?
cosi: Constance but my nickname is Cosi
by oz4356 August 13, 2010
An adjective used to describe something that is "cool" or, as used to be said "sick". Believed to have been first coined in the North of England.
I just watched the X Factor final, it was cosy!
by nicol3isacat November 9, 2013