1. The removal of insects (as from an aircraft).
2. Spraying aircraft for insects, a procedure called disinsection.
3. Freeing any area from insects.

Some countries in Africa, Latin America, the Caribbean, Australia, and the South Pacific require the spraying of aircraft passenger compartments with insecticide while passengers are present. This is done to prevent the importation of insects; such as, mosquitos.

Disinsection procedures have been determined to be safe by the World Health Organization (WHO); however, they may aggravate allergies for some passengers.