Definition of "propagation" []

• Multiplication or increase, as by natural reproduction. (noun)
• The process of spreading to a larger area or greater number; dissemination. (noun)
• Physics The act or process of propagating, especially the process by which a disturbance, such as the motion of electromagnetic or sound waves, is transmitted through a medium such as air or water. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A theoretical picture of the behavior of such a light field on propagation is shown below:"
• "Therefore the manner of the said propagation is (as it were) by real Production or Creation; so that as"
• ""The next step is to make these cells suitable for long-term propagation, so they can be used in therapies.""