Webster's Revised Unabridged Dictionary · 1913

Propagate

Propagate , transitive verb

[Latin propagatus, past participle of propagare to propagate, akin to propages, propago, a layer of a plant, slip, shoot. See Pro-, and compare Pact, Prop, Prune, transitive verb]

1.
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.
2.
To cause to spread to extend; to impel or continue forward in space; as, to propagate sound or light.
3.
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.
The infection was propagated insensibly. — De Foe
4.
To multiply; to increase. [Obsolete]
Griefs of mine own lie heavy in my breast, Which thou wilt propagate. — Shakespeare
5.
To generate; to produce.
Motion propagated motion, and life threw off life. — De Quincey

Propagate , intransitive verb

To have young or issue; to be produced or multiplied by generation, or by new shoots or plants; as, rabbits propagate rapidly.
No need that thou Should'st propagate, already infinite. — Milton