The meaning of ONEROUS is involving, imposing, or constituting a burden : troublesome.

ONEROUS definition: 1. difficult to do or needing a lot of effort: 2. difficult to do or needing a lot of effort: 3…. Learn more.

ONEROUS definition: burdensome, oppressive, or troublesome; causing hardship. See examples of onerous used in a sentence.

1. burdensome, oppressive, or troublesome: onerous duties. 2. having or involving obligations or responsibilities, esp. legal ones, that outweigh the advantages: an onerous agreement.

Definition of onerous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

If you describe a task as onerous, you dislike having to do it because you find it difficult or unpleasant.

Factsheet What does the adjective onerous mean? There are three meanings listed in OED's entry for the adjective onerous. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Sep 20, 2025 · onerous (comparative more onerous, superlative most onerous) Imposing or constituting a physical, mental, or figurative load which can be borne only with effort; burdensome. synonyms …

Onerous (adjective): Representing a significant burden or heavy load; something that requires considerable effort, labor, or expense. Typically accompanied by inconvenience or difficulty.

Britannica Dictionary definition of ONEROUS [more onerous; most onerous] formal : difficult and unpleasant to do or deal with an onerous chore/duty/task