adjective
- serving to assist or supplement; auxiliary; supplementary.
- subordinate or secondary: subsidiary issues.
- of or relating to a subsidiary.
noun, plural sub·sid·i·ar·ies.
- a subsidiary thing or person.
- subsidiary company.
- Music. a subordinate theme or subject.
adjective
- serving to aid or supplement; auxiliary
- of lesser importance; subordinate in function
noun plural -aries
- a person who or thing that is subsidiary
- short for subsidiary company
adj.1540s, from Middle French subsidiaire, from Latin subsidiarius “serving to assist or supplement,” from subsidium “help, aid” (see subsidy).