characterized by or acting in close conformity to requirements or principles

a strict observance of rituals.

stringent or exacting in or in enforcing rules, requirements, obligations, etc.

strict laws; a strict judge.

closely or rigorously enforced or maintained

strict silence.

exact or precise

a strict statement of facts.

extremely defined or conservative; narrowly or carefully limited

a strict construction of the Constitution.

close, careful, or minute

a strict search.

absolute, perfect, or complete; utmost

told in strict confidence.

stern; severe; austere

strict parents.

Obsolete . drawn tight or close.

noun

austerity , hardness , harshness , rigidity , rigor , rigorousness , sternness , stringency , toughness