Experts: meaning, definitions and examples

Denotes a person who focuses on a specific branch or area within a larger field, typically having advanced knowledge or skill.

• He is a heart specialist
• The company consulted a legal specialist for corporate matters

Refers to a person or organization that has official power to enforce rules or give orders, or someone who is accepted as knowledgeable and is thus respected.

• The local authorities imposed a curfew
• He is considered an authority on ancient Roman history

Describes someone who is very good at something, usually implying a high level of skill achieved through practice.

• She is proficient in three languages
• The technician is proficient at troubleshooting electrical problems

Used when emphasizing someone's recognized control or command over a particular subject. It can imply a formal position of power or influence.

• He is considered an authority on Renaissance art.
• You should check the information with the local authority.

Used to describe someone who has a focused, detailed understanding of and ability in a specific area. Often used in medical or technical fields.

• He is a heart specialist who performs surgeries.
• Bianca is a specialist in digital marketing.

Used for someone hired to provide expert advice professionally. This term is used in a business or professional setting.

• The company hired a financial consultant to improve their investments.
• As a consultant, she offers strategies to enhance customer engagement.