The Collaborative International Dictionary
Delapse \De*lapse"\, v. i. [imp. & p. p. Delapsed; p. pr. & vb. n. Delapsing.] [L. delapsus, p. p. of delabi to fall down; de- + labi to fall or side.] To pass down by inheritance; to lapse. [Obs.]
Which Anne derived alone the right, before all other,
Of the delapsed crown from Philip.
vb. (context obsolete English) To pass down by inheritance; to lapse.