Definition

1. Adjective:

   • Functioning in a supporting or secondary role; supplementary. Describes something that is less important than but related to something else, providing additional support or function.
   • Of or relating to a subsidiary company. Describes a company that is controlled by another company.

2. Noun:

   • A company that is completely controlled by another company. A separate legal entity, often with its own management, but whose controlling stock is owned by a parent company.
   • (Less common) An assistant or subordinate subject to the authority of another. A person or thing that serves in a supporting capacity.

Usage Examples

• Adjective:

  • The report included several subsidiary points that supported the main argument.
  • The corporation has a subsidiary interest in renewable energy technologies.
  • The parent company oversees all its subsidiary operations.

• Noun:

  • The automotive manufacturer owns a subsidiary that produces car batteries.
  • Profits from the European subsidiary increased this quarter.
  • (Less common) He acted as a subsidiary to the lead investigator.

Advanced Usage

• "Wholly-owned subsidiary": A subsidiary company in which the parent company owns 100% of the stock.
  • The tech giant acquired the startup as a wholly-owned subsidiary.
• "Subsidiary role": A position or function that is secondary and supportive.
  • In this project, marketing plays a subsidiary role to research and development.

Variants and Related Words

• Subsidiarily (adverb): In a subsidiary manner.
  • The matter was dealt with subsidiarily to the main agenda.
• Subsidiarity (noun): The principle that a central authority should perform only those tasks which cannot be performed at a more local level. (This is a related but distinct concept, often used in political contexts.)
  • The EU principle of subsidiarity aims to ensure decisions are taken as closely as possible to the citizen.

Synonyms

• Adjective: Auxiliary, secondary, supplementary, ancillary, supporting, adjunct.
• Noun (company): Affiliate, branch, division, offshoot.
• Noun (assistant): Subordinate, aide, assistant, adjunct.

Related Phrases

• "Subsidiary to": Being of secondary importance or under the control of.
  • These financial concerns are subsidiary to the main ethical issue.
• "Operating subsidiary": A subsidiary company that conducts business operations, as opposed to being a holding company.
  • The bank's main operating subsidiary handles all retail customer accounts.

Related Idioms

(Note: "Subsidiary" itself is not commonly used in idiomatic expressions. Its usage is primarily formal and technical.)

Adjective

1. functioning in a supporting capacity
   • the main library and its auxiliary branches

Noun

1. a company that is completely controlled by another company
2. an assistant subject to the authority or control of another