- adjective referring to something that is faulty or that is not operating correctly
- adjective faulty, not working properly
- adjective not legally valid
- work that is unsatisfactory, faulty or deficient, or does not conform to the contract documents, or does not meet the requirements of any inspection, reference standard, tests or approval referred to in the contract documents.
- adjective working badly or wrongly formed
- noun a person suffering from severe mental impairment