adj. long and overextended, especially in time rather than dimension
the GNU version of the Collaborative International Dictionary of English
adj. Having length; rather long or too long; prolix; not brief; -- said chiefly of discourses, writings, and the like.
The Century Dictionary and Cyclopedia
Having length; long; especially, of great length; immoderately long, sometimes with the idea of tediousness attached: applied chiefly to discourses, writings, arguments, proceedings, etc.: as, a lengthy sermon; a lengthy dissertation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. relatively long in duration; tediously protracted
Word Usage
"Africa's economy, a process which he described as lengthy, requiring patience and application."