Adjective
[[]][Allowing or characterized by great or excessive freedom of behavior][especially in the upbringing of children.]
The parents were very permissive, letting their teenagers stay out as late as they wanted.
Adjective
[[]][Allowing a wide range of values or variations][often used in technical or legal contexts to describe a lenient standard.]
The building code is relatively permissive regarding the types of materials used for interior walls.
Adjective
[[]][In computing][describing a software license that allows the software to be used][modified][and redistributed with very few restrictions.]
The MIT License is a well-known permissive license that grants broad rights to the user.