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