IPA: //nɒnˈmiːnɪŋfəl//
KK: /nɑnˈminɪŋfəl/
Not having any significance or purpose; lacking meaning.
The report was filled with nonmeaningful data that did not help in making decisions.
Nonmeaningful → It is formed from "non-" (meaning not) and "meaningful" (from "meaning" which comes from Old English "mænan", meaning to signify or intend, and the suffix "-ful" meaning full of). The word "nonmeaningful" describes something that is not full of meaning or significance.
Think of 'not' ('non-') and something that is 'full of meaning' ('meaningful') — so nonmeaningful means it lacks significance.