CEO
n. countable B1 Intermediate US //ˈsiˌiˈoʊ// ceo
n. Stands for Chief Executive Officer. The person with the highest rank in a company — the top boss who makes the most important decisions for the business.
n. Abbreviation for Chief Executive Officer. The highest-ranking executive in an organisation, responsible for major corporate decisions and overall operations. Used as a title before a name ('CEO Tim Cook').
The CEO announced a new plan for the company.
After twenty years with the firm, she was finally promoted to CEO by the board of directors.
The outgoing CEO faced intense questioning from shareholders regarding the company's declining market share and the controversial merger with its primary competitor.
Usage
Often used as a title (CEO Jane Smith) or with the definite article (the CEO).