1. the business of giving expert advice to other professionals, typically in a particular field
2. a company that provides expert advice and services to other businesses or organizations

Examples

• She started her own marketing consultancy after leaving the corporate world.
• The government hired a consultancy to review their IT systems.
• He works for a major management consultancy in London.
• The consultancy provided valuable insights into cost reduction strategies.
• Many former executives transition into consultancy work.
• The engineering consultancy specializes in renewable energy projects.
• They decided to engage a consultancy rather than hire permanent staff.