no longer existing or operative
defunct - inoperative
Something described as being ‘defunct’ is obsolete or no longer functioning. The term implies that the thing in question was once active and operational, but now has ceased or no longer has a necessary use. Though the word is related to ‘dead’, it is important to note that it should only be used in relation to inanimate objects, not people.
I enjoyed working for that newspaper when I was younger, so I’m sad to hear that it is now defunct.
The now-defunct factory in the town has become a symbol of the region's current economic woes.
Thanks to the tireless work of campaigners, that controversial law has now been made defunct.