Adjective

(en adjective)

Manifesting, exercising, or favoring rigour; 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.

*{{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= Boundary problems , passage=Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory. Its apparent simplicity explains why it is scrutinised down to tenths of a percentage point every month.}}

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

Violent.

Adjective

(en adjective)

Exact, accurate.

*

(sciences) Of experimental results, consistent, clustered close together, agreeing with each other. This does not mean that they cluster near the true, correct, or accurate value.

* {{quote-magazine, date=2013-06-22, volume=407, issue=8841, page=76, magazine=(The Economist)

, title= Snakes and ladders , passage=Risk is everywhere.