Definition

Noun 1. A category of mail: Refers to a class of postal service for sending letters, postcards, and packages that are sealed against inspection. This is the primary and most common meaning in the provided context. 2. A superior category or rank: Refers to the highest grade, quality, or rank in a system of classification (e.g., on transportation, in accommodations, or in service).

Usage Examples

• Noun (Postal Service):
  • Please send this document via 1st class mail to ensure it arrives quickly.
  • The price of a 1st class stamp increased this year.
• Noun (Superior Category):
  • They traveled to Europe in 1st class and enjoyed complimentary meals.
  • The hotel offers 1st class accommodations with a view of the ocean.

Advanced Usage

• "To be 1st class" (adjective phrase): Used informally to describe something or someone as being of the highest quality or excellence.
  • The service at that restaurant is absolutely 1st class.
  • She is a 1st class engineer.

Variants and Related Words

• First-class (adjective or adverb): The more common written form when used as a modifier.
  • We booked a first-class ticket. (Adjective)
  • The package was shipped first-class. (Adverb)
• First Class (noun): Often capitalized when referring to a specific branded service, like "British Airways First Class."

Synonyms

• Top-tier
• Premium
• Priority mail (specific synonym for the postal meaning)

Related Phrases

• "First-class citizen" (idiom): In computing and social contexts, refers to an entity that has the same rights and capabilities as others, without restrictions.
  • In this programming language, functions are treated as first-class citizens.

Noun

1. mail that includes letters and postcards and packages sealed against inspection