Learner's definition of STRICT
[also more strict; most strict]
— used to describe a command, rule, etc., that must be obeyed
They want to impose strict limits on government spending.
We are under strict orders not to leave the prisoner alone.
demanding that people obey rules or behave in a certain way
carefully obeying the rules or principles of a religion or a particular way of life
a strict Hindu
a strict vegetarian
exact or precise
The speed limit is strictly enforced.
Smoking is strictly forbidden/prohibited.
From a strictly practical perspective, this is the best way of doing things.
She follows a strictly vegetarian diet.
All personal information is kept strictly confidential.
Strictly speaking, the book is not a novel but a series of short stories.