What is the correct pronunciation of the word “processes”?

Solution 1:

Even in the dictionary, this word has several recognized pronunciations:

• In the singular, the first syllable can be pronounced with a long or short o.
• In the plural, the last syllable can be pronounced with a long or short e.

All four of these pronunciations can be heard by clicking on the speaker icons at the Merriam-Webster website.

Solution 2:

There are words derived from Greek that end with "-is" in the singular and "-es" in the plural. Thus

This thesis is . . .
These theses are . . .

This basis is . . .
These bases are . . .

This axis is . . .
These axes are . . .

In these words, the final "-es" is pronounced "eez". "Bases", when it is the plural of "base", is pronounced differently from "bases" used as the plural of "basis". Likewise when "axes" is the plural of "axe", it's not pronounced the way it is when it's the plural of "axis".

My guess is that those who say "processeez" inadvertently borrowed that pronunciation from the class of words of which the above are examples.

Solution 3:

Please note the standard for plural endings for "ess" words as noted above. We would not refer to the Disney princesses as "princesseez" or home addresses as adresseez. I am all American and must agree with Mr. Campbell that this new pronunciation of processes is simply a snobbism created with no etymological basis. I sit in meetings with energy industry executives and consultants and I cringe every time someone describes their technical "processeez" which are clearly too innovative and intellectual to be simple processes. Oh pleez.