1. the process of spreading throughout or penetrating into something

Examples

• The permeation of water through the soil was slower than expected.
• Scientists studied the permeation of gases through different materials.
• The permeation of new ideas throughout the organization took several months.
• The membrane’s permeation rate determines its effectiveness as a filter.
• Oil permeation through the concrete caused environmental concerns.
• The permeation of salt into the meat preserved it for storage.