What does the word persistent mean?

Usage examples for persistent

  1. Finally there was Pamela's persistent presence at Millie Stretton's house this afternoon. – The Truants by A. E. W. (Alfred Edward Woodley) Mason
  2. You see, Nan, he is so persistent,- and in such a nice, kind way. – Patty Blossom by Carolyn Wells
  3. About midnight there was a vigorous and persistent shaking of the screen door. – The Desert Fiddler by William H. Hamby