Home › Words › L › longsomenesslongsomenesslongsomeness means the quality of being longsome; lengthiness.EtymologyFrom Middle English *langsumnesse, from Old English langsumnes (“length; patience, long-suffering”), equivalent to longsome + -ness.nounThe quality of being longsome; lengthiness.Definitions & examples from Wiktionary (CC BY-SA 3.0).