to cause to continue or multiply by generation, or successive production; -- applied to animals and plants; as, to propagate a breed of horses or sheep; to propagate a species of fruit tree.-to cause to spread to extend; to impel or continue forward in space; as, to propagate sound or light.-to spread from person to person; to extend the knowledge of; to originate and spread; to carry from place to place; to disseminate; as, to propagate a story or report; to propagate the christian religion.-to multiply; to increase.-to generate; to produce.-to have young or issue; to be produced or multiplied by generation, or by new shoots or plants; as, rabbits propagate rapidly.