v. t. [ imp. & p. p. Lengthened p. pr. & vb. n. Lengthening ] 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. Dryden. [ 1913 Webster ]