Propagation can refer to:

• Chain propagation in a chemical reaction mechanism
• Crack propagation, the growth of a crack during the fracture of materials
• Propaganda, non-objective information used to further an agenda
• Reproduction, and other forms of multiplication or increase
  • Plant propagation, the production of more plants
  • Propagation of schema, in artificial reproduction
• Software propagation, the distribution of free software
• Wave propagation, the motion of a wave
  • Radio propagation, the application of wave propagation to radio communications

In music

• Propagation (album)
• "Propagation", a song by Lower Dens from the album Nootropics
• "Propagation", a song by Com Truise from the album Iteration