An examiner is someone whose job is to test, inspect, or evaluate something carefully. When you take a standardized test, an examiner might walk around the classroom making sure everyone follows the rules. In a driver's license office, an examiner sits in the car with new drivers to see if they can handle different traffic situations safely.

Examiners show up in many contexts. A medical examiner investigates deaths to determine their causes. A patent examiner in the government reviews new inventions to decide if they're original enough to deserve legal protection. Bank examiners inspect financial records to make sure banks follow the law.

An examiner studies things systematically, checking for problems, measuring against standards, and making judgments based on what they find. When a coin examiner inspects an old penny, they look for specific details that reveal whether it's genuine or fake, valuable or common.

Notice that examiners usually have authority or expertise. They're curious observers with the knowledge and responsibility to make official decisions based on what they discover.