a. [ L. laboriosus, fr. labor labor: cf. F. laborieux. ] 1. Requiring labor, perseverance, or sacrifices; toilsome; tiresome. [ 1913 Webster ]
Dost thou love watchings, abstinence, or toil, Laborious virtues all? Learn these from Cato. Addison. [ 1913 Webster ]
2. Devoted to labor; diligent; industrious; as, a laborious mechanic. [ 1913 Webster ]
-- La*bo"ri*ous*ly, adv. -- La*bo"ri*ous*ness, n. [ 1913 Webster ]