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1.
A term the British use to describe everything.
I's brilliant in't it? Right, yah, bloody brilliant. Wha' is? Oh, yah, right, brilliant. Bloody brillant.
by Lord Russell August 12, 2004
644 76
 
2.
An outstanding performance, concept, or product
Those burgers were simply brilliant!!!
by Splenda June 21, 2001
189 90
 
3.
A word which in the past meant that something was exceptionally good, or to express great pleasure:

Its strength has been eroded by overuse, and it can now be used to respond to any mildly pleasing news. Somehow the extreme unctuousness and insincerity of this tends to go unrecognized or is an occasion for the self-gratifying feeling that one is being tolerant.
In the olden days:

Smith-"Everyone has the day off tomorrow!"
Jones-"Brilliant!"

Nowadays:

Waiter: "Are you ready to order?"
Customer: "err, yes..."
Waiter: "Brilliant!!!"
by Pistefka September 24, 2009
73 22
 
4.
The word used by Arthur Shappey in John Finnemore's, Cabin Pressure to describe everything that isn't his father.
"Polar bears, are BRILLIANT"

Alternatively, in regards to Gordon Shappey:

Arthur: He's ah-- he's ahh-- he's alright.
Martin: Oh god he must be aweful!
by MissOkidoke October 09, 2012
14 8
 
5.
1. The way someone is perceived by others as great
Tara is the most brilliant person I've ever met.
by Flintpeng April 28, 2013
4 3
 
6.
A way to describe someone's awesomeness
E.g. Tara is the most brilliant person I have ever met
by flintpeng April 28, 2013
6 6
 
7.
Adjective with shared origins and formal definitions with "bright" but with geographically varied differences in colloquial use:

A. United States: Intelligent, particularly in innovative or unique ways. Often used sarcastically for shining examples of outstanding and innovative stupidity.

B. Britain: Of very high quality in any way, in a manner or circumstance where that quality stands out.

C. Canada, Australia, and New Zealand: Predominantly used in the sarcastic mode of the US sense.
US(direct): The marketing of sage as a recreational drug by calling it 'Sticky Purple Salvia' was brilliant.

US(sarcastic): Rick Santorum is brilliant to answer questions about contraception.

UK: The Doctor frequently says 'You're brilliant!" to people who have no idea why.

Canada: With P.M. Harper's party leading an unstable minority government, his strategy of looking to George Bush as a role model is brilliant.
by grumpybozo March 09, 2012
6 6