never-ceasing; "the relentless beat of the drums" retained; not shed; "persistent leaves remain attached past maturity"; "the persistent gills of fishes
About some data or data structures: existing after the execution of the program. Remaining in existence past the lifetime of the program that creates it
Someone who is persistent continues trying to do something, even though it is difficult or other people are against it. a persistent critic of the government's transport policies
Something that is persistent continues to exist or happen for a long time; used especially about bad or undesirable states or situations. His cough grew more persistent until it never stopped Shoppers picked their way through puddles caused by persistent rain
Any data held within a database Any data not stored in a database is transient and will be erased when aprocess is stopped