Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
mellowness is a noun meaning "a feeling of good humor and sympathy through maturity or intoxication or a relaxed state". It carries 5 recorded senses.
a feeling of good humor and sympathy through maturity or intoxication or a relaxed state
a taste (especially of fruit) that is ripe and of full flavor
the property of a sensation that is rich and pleasing
“the music had a fullness that echoed through the hall”
“the cheap wine had no body, no mellowness”
“he was well aware of the richness of his own appearance”
geniality, as through the effects of alcohol or marijuana
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for mellowness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.