Meaning of copy protection

cop'y protec"tion

Pronunciation: (kop'ē-pru-tek"tid), [key]
— Computers. Computers.
  1. a routine that is included in a program by its publisher to prevent the software from being duplicated except for a single backup copy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.