Home › Words › P › plumbnessplumbnessplumbness means the state or condition of being plumb (truly vertical).Among words judged in Lexicurio's Arena, plumbness ranks #31,183 of 42,752 for Qualifying.EtymologyFrom plumb + -ness.nounThe state or condition of being plumb (truly vertical).Definitions & examples from Wiktionary (CC BY-SA 3.0).