noun. The act of permeating, or the state of being permeated.

noun. The act of permeating, passing through, or spreading throughout, the pores or interstices of any substance.

noun. The movement of a fluid through a porous or permeable solid.

noun. The spreading of something (especially something malignant) through the body via blood vessels etc.

noun. the process of permeating or infusing something with a substance

noun. mutual penetration; diffusion of each through the other

"Socialist, rejected the Marxian in favour of Jevonsian economics, and devoted itself to the social education of the public by means of lectures, pamphlets and books, and to the spread of Collectivist ideas by the "permeation" of public bodies and political parties."