1. providing necessary support to the primary activities or operation of an organization, institution, or system

1. a person whose work provides necessary support to the primary activities of an organization, institution, or system
Usage: often plural

Examples

• The hospital’s ancillary services include physical therapy and nutrition counseling.
• She works in an ancillary role, supporting the main research team.
• The school hired additional ancillaries to help with administrative tasks.
• Ancillary equipment is stored in the basement.
• The company’s ancillary businesses generate significant revenue.
• Medical ancillaries play a crucial role in patient care.
• These are ancillary concerns compared to the main issue.
• The ancillary staff received training on new procedures.