lengthiness
1. [ noun ] amount or degree or range to which something extends
Synonyms: prolongation extension
Examples:

: "the wire has an extension of 50 feet"

Related terms: longness prolong
2. [ noun ] the consequence of being lengthened in duration
Synonyms: protraction continuation prolongation
Related terms: duration continue stay prolong prolong retain
Similar spelling:   lengthen
  lengthily
  lengthwise
  lengthways
  lengthened
  lengthening