noun
- The highest rank in a classification.
- Mail that includes letters and postcards and packages sealed against inspection.
- synonyms: 1st class, first-class mail, 1st-class mail
- The most expensive accommodations on a ship or train or plane.
adverb
- By first class conveyance; with first class accommodations.
- usage: "we always travel first class"
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). first class. Retrieved September 20, 2026, from http://smartdefine.org/first_class/definitions/1204042 |
| Chicago | WordNet. 2010. "first class" http://smartdefine.org/first_class/definitions/1204042 (accessed September 20, 2026). |
| Harvard | WordNet 2010, first class, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/first_class/definitions/1204042>. |
| MLA | WordNet. "first class" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/first_class/definitions/1204042> |