Rigorous vs. Strict — What's the Difference?

Characterized by or adhering to strict standards or methods; exacting and thorough

In mathematical writing, the term strict refers to the property of excluding equality and equivalence and often occurs in the context of inequality and monotonic functions. It is often attached to a technical term to indicate that the exclusive meaning of the term is to be understood.

Harsh, severe, or demanding

Demanding that rules concerning behaviour are obeyed and observed

Very unpleasant or inclement

(of a person) following rules or beliefs exactly

Adhering strictly to a belief or ideology; uncompromising or inflexible

Exact in correspondence or adherence to something; not allowing or admitting deviation or relaxation

Showing, causing, or favoring rigour/rigor; scrupulously accurate or strict; thorough.

Rigorous in the imposition of discipline

Severe; intense.

Conforming completely to established rule, principle, or condition

Manifesting, exercising, or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.

Requiring close observance or demanding in expectations

Severe; intense; inclement; as, a rigorous winter.

Carefully maintained or observed

Violent.

Not loose or vague; exact or precise

Adhering scrupulously and exactly to accepted principles; hence, logically valid; as, a rigorous proof.

(Botany) Stiff, narrow, and upright.

Rigidly accurate; allowing no deviation from a standard;

Strained; drawn close; tight.

Demanding strict attention to rules and procedures;

Tense; not relaxed.

Used of circumstances (especially weather) that cause suffering;

Exact; accurate; precise; rigorously particular.

Governed or governing by exact rules; observing exact rules; severe; rigorous.

Rigidly interpreted; exactly limited; confined; restricted.

(botany) Upright, or straight and narrow; — said of the shape of the plants or their flower clusters.

Severe in discipline.

Irreflexive; if the described object is defined to be reflexive, that condition is overridden and replaced with irreflexive.

Strained; drawn close; tight; as, a strict embrace; a strict ligature.

Tense; not relaxed; as, a strict fiber.

Exact; accurate; precise; rigorously nice; as, to keep strict watch; to pay strict attention.

Governed or governing by exact rules; observing exact rules; severe; rigorous; as, very strict in observing the Sabbath.

Rigidly; interpreted; exactly limited; confined; restricted; as, to understand words in a strict sense.

Upright, or straight and narrow; - said of the shape of the plants or their flower clusters.

(of rules) stringently enforced;

Rigidly accurate; allowing no deviation from a standard;

Incapable of compromise or flexibility

Not indulgent;

Unsparing and uncompromising in discipline or judgment;

Severe and unremitting in making demands;