reasonable accommodation /rē″zənəbəl/ , an interpretation of the U.S. Americans With Disabilities Act regarding responsibility of an employer to provide an adequate work environment for a disabled but otherwise competent employee. The rule may apply to making facilities accessible, restructuring jobs, reassigning disabled employees to vacant positions, modifying work schedules, acquiring or modifying equipment, and adjusting training materials and examinations. The employer may not be required to provide reasonable accommodation if it can be shown to impose an “undue hardship” on the business operation.