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Definition of laborious adjective from the Oxford Advanced Learner's Dictionary

laborious

adjective
 
/ləˈbɔːriəs/
 
/ləˈbɔːriəs/
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  1. taking a lot of time and effort
    • a laborious task/process
    • Checking all the information will be slow and laborious.
    Oxford Collocations DictionaryLaborious is used with these nouns:
    • process
    • task
    See full entry
    Word Originlate Middle English (also in the sense ‘industrious, assiduous’): from Old French laborieux, from Latin laboriosus, from labor ‘labour’.
See laborious in the Oxford Advanced American Dictionary
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