2.A group of birds, fish, or other animals that are going together from one region or country to another for feeding or breeding purposes.
3. A group of people moving together; especially, in some given time period.
4. In chemistry, the movement of ions under the influence of an electric field.
5. The movement of an atom, or a group of atoms or double bonds, from one part of a molecule to another.
6. A transfer of computer data, programs, or hardware from one system to another.
7. The movement of oil, gas, contaminants, water, or other liquids through porous and permeable rock.
8. A condition or process of extraction, in which an aqueous or organic solvent selectively dissolves part of an adhesive film and carries it to a different location as the solvent evaporates.
General biological migrations
Animal migration is a predictable, recurring group movement that is characteristic of the members of a given species, and which occurs regularly in response to seasonal changes in temperature, precipitation, food availability, etc.
The process usually involves a round-trip movement between two areas, to seek a more suitable breeding place, a greater food and water supply, or other more favorable environmental conditions.
Antigens in a gel medium in which the pH is controlled are strongly negatively charged and will migrate rapidly across the electric field toward the anode.
The antibody in such a medium is less negatively charged and will migrate in an opposite or "counter" direction toward the cathode.
If the antigen and antibody are specific for each other, they combine and form a distinct line of precipitation.
This technique is becoming increasingly useful for detecting antigens or antibodies specific for given infectious diseases, diagnosing clinical bacterial infections, and choosing medications to treat the infections.
2. Movement of ions produced in an electrolyte, semiconductor, etc., by the application of an electric potential between electrodes.