'Vigorous' definitions:

Definition of 'vigorous'

From: WordNet
adjective
Characterized by forceful and energetic action or activity; "a vigorous hiker"; "gave her skirt a vigorous shake"; "a vigorous campaign"; "a vigorous foreign policy"; "vigorous opposition to the war"
adjective
Strong and active physically or mentally; "a vigorous old man who spent half of his day on horseback"- W.H.Hudson

Definition of 'Vigorous'

From: GCIDE
  • Vigorous \Vig"or*ous\, a. [Cf. OF. vigoros, F. vigoureux, LL. vigorosus.]
  • 1. Possessing vigor; full of physical or mental strength or active force; strong; lusty; robust; as, a vigorous youth; a vigorous plant. [1913 Webster]
  • Famed for his valor, young, At sea successful, vigorous and strong. --Waller. [1913 Webster]
  • 2. Exhibiting strength, either of body or mind; powerful; strong; forcible; energetic; as, vigorous exertions; a vigorous prosecution of a war. [1913 Webster]
  • The beginnings of confederacies have been always vigorous and successful. --Davenant. [1913 Webster] -- {Vig"or*ous*ly}, adv. -- {Vig"or*ous*ness}, n. [1913 Webster]

Synonyms of 'vigorous'

From: Moby Thesaurus