1) The process of comparing an instrument's output signal with reality. Instruments that measure solar energy tend to "drift", that is, their output signals do not mean the same thing from one time period to another. Because of this, they are periodically (annually or semi-annually) re-calibrated against more reliable instruments.

2) Adjusting a measuring instrument to make it accurate. The set of operations which establish, under specified conditions, the relationship between values indicated by a measuring instrument or measuring system and the corresponding values of a quantity realized by a reference standard.

3) The act of adjusting the color of one device relative to another, such as a monitor to a printer, or a scanner to a film recorder. Or, it may be the process of adjusting the color of one device to some established standard.
This radio needs some calibration.
by IrishRepublicanArmy December 26, 2003
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Another way of describing someone who is buff, ripped or rather muscular.

Great when associated with guns
Mate, your guns are totally calibrated!

You want to come to the gym with me and get calibrated?
by TheWorldofAndo July 26, 2010
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Not only a shit car and alcohol free beer but also commonly used for describing ones ability. In common with the above words, often full of irony.
Sam Lilley: A man of my calibre never goes down (whilst lying in bed after getting over excited at the weekend...
by Jim September 30, 2004
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The technical terminology for hitting any sort of electronic device to get it to work properly; a solid and punctuated smack or slap.
"Theo noticed the screen on his iPad was slightly scrambled so he quickly implemented the impact calibration principle to the edge of the device. One good smack and the screen was clear as the blue sky on a summer's day.
by MCBassGuitar May 5, 2016
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The process of beating the snot out of a piece of equipment to get it to work properly
I had to perform a minor percussion calibration on that IBM workstation until it cooperated.
by D. Williams August 9, 2005
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When you get asked what you have been up to and have nothing interesting to say
Person 1: So what have you been up to lately?

Person 2: Not much just calibrating cabbages
by Dr Cabbage September 9, 2010
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