|Origin:||, past participle of propagare 'to breed plants from shoots', from propago 'shoot from which a new plant is produced'|
1 [transitive] formal
to spread an idea, belief etc to many people:
The group launched a website to propagate its ideas.
2 [intransitive and transitive]TACDLG
if you propagate plants, or if they propagate, they start to grow from a parent plant to produce new plants:
Propagate your plants in fresh soil.
if an animal, insect, etc propagates itself or is propagated, it increases in number [= reproduce]
—propagation noun [uncountable]