migration

Migration **//– noun //** 1. the process or act of migrating. 2. a migratory movement: // preparations for the migration. // 3. a number or body of persons or animals migrating together. 4. // Chemistry //. a movement or change of position of atoms within a molecule. 5. // Physics //. [|diffusion] ( def. 3a ). [|www.wikipedia.com/migration/]