1. Closeness; tightness; opposed to laxity.
2. Exactness in the observance of rules, laws, rites and the like; rigorous accuracy; nice regularity or precision.
I could not grant too much or distrust too little to men that pretended singular piety and religious strictness
3. Rigor; severity.
These commissioners proceeded with such strictness and severity as did much obscure the kings mercy.