adjective

• Obstinately refusing to give up or let go.
• Insistently repetitive.
• Indefinitely continuous.
• (botany) Lasting past maturity without falling off.
• (computing) Of data or a data structure: not transient or temporary, but remaining in existence after the termination of the program that creates it.
• (mathematics) Describing a fractal process that has a positive Brown function
• (mathematics, stochastic processes, of a state) non-transient.