"Propagate" refers to the process of spreading or multiplying something, such as plants, ideas, or information. In gardening, for example, to propagate a plant means to create new plants from existing ones, often through methods like cuttings or seeds. This allows for the growth of more plants without needing to buy new ones. In a broader context, "propagate" can also describe the way ideas or beliefs are shared and spread among people. For instance, social media platforms can help propagate news and trends quickly, reaching a wide audience and influencing public opinion.