(the type of travel or type of hotel which is most expensive and comfortable adjectivetop-quality or most expensive ExampleShe is a first-class accountant.noun, adverb(the type of travel or type of hotel which is most expensive and comfortable Examplesto travel first-class • First-class travel provides the best service. • A first-class ticket to New York costs more than I can afford. • The MD prefers to stay in first-class hotels. top-quality or most expensive