To extent in length; to make longer in extent or duration; as, to lengthen a line or a road; to lengthen life; -- sometimes followed by out. [1913 Webster]

"What if I please to lengthen out his date." [1913 Webster]

lengthen, v. i.

To become longer. Locke. [1913 Webster]

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OXFORD DICTIONARY

lengthen, v.
1 tr. & intr. make or become longer.
2 tr. make (a vowel) long.

Derivative

lengthener n.

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THESAURUS

lengthen

add to, aggrandize, amplify, augment, boost, broaden, build, build up, continue, dawdle, drag out, draw, draw out, dwell on, elongate, enlarge, exalt, expand, extend, fatten, fill out, hike, hike up, hold, increase, inflate, jack up, jump up, keep, keep alive, keep going, keep up, lengthen out, let out, linger on, maintain, maximize, parlay, perpetuate, preserve, procrastinate, produce, prolong, prolongate, protract, pull, put up, pyramid, raise, retain, spin out, strain, stretch, stretch out, string out, sustain, tauten, temporize, tense, thicken, tighten, up

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ROGET THESAURUS

lengthen

Length

VB be long, stretch out, sprawl, extend to, reach to, stretch to, make a long arm, drag its slow length along, render long, lengthen, extend, elongate, stretch, prolong, produce, protract, let out, draw out, spin out, drawl, enfilade, look along, view in perspective, distend (expand).

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