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.