'labourious' definitions:
Definition of 'labourious'
From: GCIDE
- labourious \labourious\ adj.
- 1. characterized by toilsome effort; same as laborious; -- British spelling. [Chiefly Brit.]
- Syn: arduous, backbreaking, back-breaking, grueling, gruelling, hard, heavy, laborious, punishing, slavish, strenuous, toilsome. [WordNet 1.5]