Definitions of impregnation:

  • noun:   the process of totally saturating something with a substance
    Example: "The impregnation of wood with preservative"
  • noun:   material with which something is impregnated
    Example: "The impregnation, whatever it was, had turned the rock blue"
  • noun:   creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant