Allowing or characterized by great or excessive freedom of behavior. The permissive parents allowed their children to stay out late on school nights.
Allowing or characterized by a relaxed or lenient attitude towards rules or standards. The school has a permissive dress code, allowing students to wear casual clothes.
(of a host organism or cell) Allowing the entry, replication, or expression of a virus, plasmid, or other genetic element. The cell line is permissive for influenza virus replication.
Optional or facultative rather than compulsory; permitted but not required by law or regulation. Under the new zoning act, mixed-use development is merely permissive, so developers are not obliged to include residential units.