Expert: meaning, definitions and examples

Someone with a high level of knowledge or skill in a particular area.

• She is an expert in cybersecurity
• The company hired an expert to improve their marketing strategy

Someone who focuses on a specific aspect within a broader field, having detailed knowledge or skills in that particular area.

• He is a heart specialist at the local hospital
• The company employed a tax specialist to handle their financial matters

Someone with official power or recognized knowledge in a specific field, often used in formal or academic contexts.

• He is a leading authority on ancient Greek history
• The professor is an authority in molecular biology

Someone who is proficient and earns a living in a particular activity or occupation, often implying a high standard of ethical and work behavior.

• She is a professional athlete
• The architecture firm is known for its professional conduct

This is used when referring to someone with a high level of knowledge or skill in a particular area.

• She's an expert in quantum physics.
• We need an expert to solve this complex problem.

This refers to a professional who provides expert advice in a specific field, often hired for a limited period to solve a particular issue or to provide strategic advice.

• They hired a consultant to optimize the business processes.
• The consultant reviewed our project plans and suggested improvements.

This is often used in the context of someone who gives formal advice, especially in professional settings or official roles. It is usually spelled 'advisor' in American English.

• He is the financial adviser for the company.
• The president's adviser on foreign affairs made a statement.

Used to describe someone who is highly skilled or knowledgeable in a narrow area of expertise, often within a larger field.

• She is a cardiac specialist at the hospital.
• We need a software specialist to fix this issue.