Home › Words › U › undullnessundullnessundullness means the quality of not being dull.Among words judged in Lexicurio's Arena, undullness ranks #36,060 of 42,747 for Qualifying.EtymologyFrom undull + -ness.nounThe quality of not being dull.e.g.“This quality of surprising undullness you will find among artists and among the saints, saints in our modern sense.” — 1942, Ronald Owen Hall, The Missionary-Artist Looks at His Job, page 11:Definitions & examples from Wiktionary (CC BY-SA 3.0).