The definition of a eer is a person who works in a specialized field and is an expert in their field. They have a deep understanding of the subject matter and are able to apply their knowledge to solve complex problems. They are often sought out for their expertise and are highly valued in their industry. Eers are usually highly educated and have extensive experience in their field. They are often seen as the go-to person for advice and solutions. They are also often seen as mentors, as they are able to provide guidance and insight to those who are just starting out in their field. Eers are typically passionate about their work and are always looking for ways to improve their skills and knowledge.