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1.
1 trillion bytes or 1024 gigabytes
Holy shit, i have a terabyte of back up space!
by bathax November 27, 2003
 
2.
A terabyte is pretty much the largest amount of computer space that is commercially available. It usually only comes in the form of an external hard drive. A terabyte is equal to 1024 gigabytes or 8,796,093,022,208 bits.
My mom ran out of room for our family photos and videos on our 500 gigabyte hard drive, so she had to buy a 1 terabyte hard drive... *headdesk*
by Wolfiekun hugger May 06, 2009
 
3.
1000 gigabytes. 2 to the 40th power or approximately a thousand billion bytes (that is, a thousand gigabytes).
My pc PWNS you because I gots 1TB bitxhz.
by thomas t January 15, 2005