persistent

Adjective

1. Obstinately refusing to give up or let go.
   • She has had a persistent cough for weeks.
   • The most persistent tormentor was Alex Oxlade-Chamberlain, who scored a hat-trick in last month’s corresponding fixture in Iceland. His ability to run at defences is instantly striking, but it is his clever use of...
2. Insistently repetitive.
   • There was a persistent knocking on the door.
3. Indefinitely continuous.
   • There have been persistent rumours for years.
   • Although many individuals seek meaningful social connection, they face persistent barriers to sustaining relationships, including communication difficulties, social rejection, loneliness, and limited social...
4. Lasting past maturity without falling off.
   • Pine cones have persistent scales.
   • The Jubulaceae have a leaf whose lobule, usually transformed into a water-sac, is normally very narrowly attached to the stem and to the dorsal lobe; indeed some Frullania taxa reproduce vegetatively by dropping the...
5. Of data or a data structure: not transient or temporary, but remaining in existence after the termination of the program that creates it.
   • Once written to a disk file, the data becomes persistent: it will still be there tomorrow when we run the next program.
6. Describing a fractal process that has a positive Brown function
7. non-transient.