Being permissive is the opposite of being strict. Permissive parents let their kids stay up later and have more sweets.
A permissive person is a little more lenient or loosey-goosey with the rules. A permissive teacher is easier on the students and lets them get away with more. A permissive coach will cut players slack during practices and games. Laws can be permissive too — about drugs, guns, and other things that could be tightly controlled. A permissive society is one with more freedom. When a situation is permissive, there's permission to do more things.