LENGTH'EN, length'n.
1. To extend in length to make longer to elongate as, to lengthen a line.
2. To draw out or extend in time to protract to continue in duration as, to lengthen life. The days lengthen from December to June.
3. To extend as, to lengthen a discourse or a dissertation.
4. To draw out in pronunciation as, to lengthen a sound or a syllable. This verb is often followed by out, which may be sometimes emphatical, but in general is useless.
What if I please to lengthen out his date?
LENGTH'EN, To grow longer to extend in length. A hempen rope contracts when wet, and lengthens when dry.