Less active and inactive are terms that members of The Church of Jesus Christ of Latter-day Saints (LDS Church) use to describe someone who is not actively participating, but who is still on church records. Generally speaking, these are individuals who do not attend church and are not involved in church activities or callings. Less-active Mormons often maintain good relations with and positive feelings toward the LDS church. Reasons for disengagement can include lifestyle issues and problems with social integration.
The LDS Church does not release statistics on church activity, but it is likely that about 60% of Mormons in the United States and 70% worldwide are less active or inactive. Activity rates tend to vary with age, and disengagement occurs most frequently between age 16 and 25. Overall, women tend to be more active than men. A majority of less-active members return to church activity later in life.
The Jewish equivalent of less active would be non-observant. The Catholic equivalent would be non-practicing.