'Rigorous' definitions:

Definition of 'rigorous'

From: WordNet
adjective
Rigidly accurate; allowing no deviation from a standard; "rigorous application of the law"; "a strict vegetarian" [syn: rigorous, strict]
adjective
Demanding strict attention to rules and procedures; "rigorous discipline"; "tight security"; "stringent safety measures" [syn: rigorous, stringent, tight]

Definition of 'Rigorous'

From: GCIDE
  • Rigorous \Rig"or*ous\, a. [F. rigoureux, LL. rigorosus. See Rigor.]
  • 1. 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. [1913 Webster]
  • He shall be thrown down the Tarpeian Rock With rigorous hands. --Shak. [1913 Webster]
  • We do not connect the scattered phenomena into their rigorous unity. --De Quincey. [1913 Webster]
  • 2. Severe; intense; inclement; as, a rigorous winter. [1913 Webster]
  • 3. Violent. [Obs.] "Rigorous uproar." --Spenser. [1913 Webster]
  • 4. (Mathematics, Logic) Adhering scrupulously and exactly to accepted principles; hence, logically valid; as, a rigorous proof. [PJC]
  • Syn: Rigid; inflexible; unyielding; stiff; severe; austere; stern; harsh; strict; exact. [1913 Webster] -- {Rig"or*ous*ly}, adv. -- {Rig"or*ous*ness}, n. [1913 Webster]

Synonyms of 'rigorous'

From: Moby Thesaurus