'Lengthiest' definitions:

Definition of 'Lengthiest'

From: GCIDE

Lengthy \Length"y\ (-[y^]), a. [Compar. Lengthier (-[i^]*[~e]r); superl. Lengthiest.] Having length; rather long or too long; prolix; not brief; -- said chiefly of discourses, writings, and the like. "Lengthy periods." --Washington. "Some lengthy additions." --Byron. "These would be details too lengthy." --Jefferson. "To cut short lengthy explanations." --Trench. [1913 Webster] Lenience