[f. LENGTHEN v. + -ING2.] That lengthens, in senses of the vb.
1764. Goldsm., Trav., 10. My heart drags at each remove a lengthening chain.
1797. Mrs. Radcliffe, Italian, vii. He heard only the lengthening echoes of his own voice.
1865. J. H. Newman, Gerontius, § 2. Is this peremptory severance Wrought out in lengthening measurements of space?
a. 1872. B. Harte, Lost Galleon, 141. To cut a lengthening story short, She never saved it.