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 (lĕngk′thē, lĕng′-, lĕn′-)
adj. length·i·er, length·i·est
1. Of considerable length, especially in time; extended: a lengthy convalescence.
2. Tediously long; drawn-out: a lengthy explanation.

length′i·ly adv.
length′i·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lengthiness - amount or degree or range to which something extends; "the wire has an extension of 50 feet"
longness - the property of being of long spatial extent; "one gene causes shortness and the other causes longness"
coextension - equality of extension or duration
2.lengthiness - the consequence of being lengthened in duration
length, duration - continuance in time; "the ceremony was of short duration"; "he complained about the length of time required"
fermata - (music) a prolongation of unspecified length on a note or chord or rest
References in classic literature ?
It was commenced by the Stranger with some impatience at the lengthiness of my introductory process.
Like I've said in past columns, in today's world, if people put your e-mail aside because of its lengthiness and think they'll return to it later, they usually never do.
A side-trip to the City pushes the film into dramatic looseness, and soon The Lobster seems burdened with a sense of inchoate lengthiness.
In an appendix to the ADA's implementing regulations, the Department of Justice explains that where a notepad and paper are ineffective due to the complexity or lengthiness of the communication taking place, sign language interpreters may act as appropriate auxiliary aids.
In Brazil, the rapidly changing clinical landscape and complexity and lengthiness of approval and import processes have been cited as the biggest drawbacks.
44) A key issue with section 10 as applied to individual landowners is its lengthiness and complexity--it is possible that an application for an incidental take permit will trigger both the National Environmental Policy Act (NEPA) (45) and a section 7 FWS consultation.
The study was further limited by the small return rate of prospective study materials, which may have been related to the lengthiness of survey materials, need to access the internet, and prolonged two-month interval between survey provision and posting of reminder sign.