The correct way to spell the oft misused DEFINATELY.
Note that "finite" appear in the word, stresing the "limits" that the definition below implies.

having distinct or certain limits
free of all ambiguity, uncertainty, or obscurity <demanded a definite answer> b : UNQUESTIONABLE, DECIDED <the quarterback was a definite hero today>

def·i·nite·ly adverb

The hardest fucking word to spell in the English language.

In contemporary English, "definitely" means "never". A face-saving maneuver in conversation...when somebody says definitely, it's an up-front lie.

A word that indicates something is NOT going to happen.

Having distinct or certain limits - However, this adverb is OVERUSED by many idiotic twenty-somethings - This can be witnessed time and time again on moronic "dating" shows such as, for example, "Elimidate" or "The 5th Wheel" - Males and females alike are guilty of this bizarrely exagerrated use of the word 'definitely'. It's the 'totally' of the 90s/00s...

Use this when talking sarcastically.

A non-commital answer to something one doesn't want to do that's sounds definative.