Someone who's lapsed has stopped participating in some activity or following some particular rules. A lapsed Baptist was raised in the Baptist church but no longer practices this religion.

If you describe yourself as a lapsed Catholic or a lapsed Hindu, you once took an active part in your religion and now you don't — in fact, you may no longer believe. This adjective can also mean "expired," like your dog's lapsed license, which ran out months ago and you keep forgetting to renew. Lapsed comes from the verb lapse, which stems from either the Latin lapsus, "a slipping and falling," or lapsare, "to lose one's footing."

Definitions of lapsed
  1. adjective
    no longer active or practicing
    “a lapsed Catholic”
    synonyms: nonchurchgoing
    hostile or indifferent to religion
Word Family

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