adj

• (of a person) Changed to a less valued condition or state; especially having lost one's religious faith.
  "...satisfy the Doubtful, confirm the Wavering, recover the Lapsed, and be useful to all according to their several Circumstances and Conditions."
• (humorous) By extension, having changed a (secular) belief or adherence.
  "My mother knew that I was a lapsed Republican, but did not dream of the depth to which I had fallen."
• (archaic, of a legacy) Having passed from the original holder or authority; no longer claimed.
  "The only legitimate claimants must be, Albert of Austria, son of the sister of the last duke John; and the emperor Sigsmund, who might consider this part of Bavaria as a lapsed fief: that in this quality he had given the investiture of it to his son-in-law"