Reference meaning
first class
Last updated
the highest rank in a classification
Other meanings
2. noun
mail that includes letters and postcards and packages sealed against inspection
3. noun
the most expensive accommodations on a ship or train or plane
4. adjective
very good;of the highest quality
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 04730191-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.