strict

adjective
UK /strɪkt/
US /strɪkt/

Someone who is strict makes you follow rules and does not let you break them.

Our teacher is strict about being on time.


OTHER MEANINGS

2. Following rules or standards exactly and carefully.

The school has strict rules about uniforms.

3. Very exact or precise, with no room for change.

The recipe gives strict measurements for every ingredient.

4. Complete and absolute, with no exceptions.

The information is kept in strict confidence.