Our local Indian restaurant has a beautifully printed sign in the window - “Allergies and intolerance available on request. Please ask any member of staff”. 
Style counterbalances obscurity!
Concerning the word "definitely"...
I think I’ve seen it spelled “definately” or even “definatly” 1
And then, I’ve many times heard “nuclear” pronounced “nukelar” 2 (even by one of my professors at the University of Chicago! 
)...
You might be just right, now that I think of it.
But then again, how do you pronounce define? Dee-fine, or Def-in?
But then again again, English pronunciation is the most illogical and counterintuitive of all the languages I can speak or read 3. 
1: I have noticed the "a" mistake for a good number of years among my students, even though nobody (at least here in Ohio) would ever say "defin
ately" with the "a" from "late," or (for "defin
atly") the "a" from "gnat."
Perhaps it creeps in from the "-ate" in words such as "literate" or "considerate" or the adjectival pronunciation of "moderate." I have not often been hearing a short "i" in "definite" from speakers, but too often an incorrect short-e sound, i.e. closer to the pronunciation of "literate."
2 : I have also heard "nuke-yoo-lar" as a pronunciation. I think that comes mainly from southern states, but it could be more widespread.
3 :
Define = "
Dee-fine" with a long "e" and a long "i" and the accent on the second syllable.
You can blame William the Conqueror and his French-fried Vikings
for the problems in English spelling: when they invaded England and brought along their early Medieval Norman French, things became muddled quickly!
About a year ago I grumbled about the pronunciation of "
Important," and nothing has improved. I have heard ever more people on television pronouncing the "impor-" and then making the sound of a goose being run over by a bus.
