Learner's definition of STRICT
[also more strict; most strict]
1 — 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.
2 : demanding that people obey rules or behave in a certain way 3 a : carefully obeying the rules or principles of a religion or a particular way of life
b : complete or thorough
a strict Hindu
a strict vegetarian
4 : completely correct : 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.