Permissiveness may refer to: Permissiveness (endocrinology), between hormones and cells. Permissiveness (virology), between viruses and cells.
Permissive may refer to: Permissive society, a liberalization of social norms in a society. Permissive software license, a free-software license. Permissive cell or permissive host, a cell which allows a virus to circumvent its defenses and replicate. Permissive mood, a grammatical mood found in some languages. Permissive (film), a 1970 British exploitation drama film.