1. The highest rank in a classification
   "He always travelled first class on his business trips"
    
2. The most expensive accommodations on a ship, train or plane
   "They splurged on first class tickets for their honeymoon flight"
    
3. Mail that includes letters and postcards and packages sealed against inspection
   "She sent the important documents by first class";
   - 1st class, first-class mail, 1st-class mail

1. By first class conveyance; with first class accommodations
   "we always travel first class"

1. Of the highest quality, skill, etc.; very good or impressive
   "a first-class mind";
   - ace [informal], A-one [informal], crack [informal], first-rate, super, tiptop, topnotch [informal], top-notch [informal], tops [informal], A1 [informal], top-class, gnarly [N. Amer, informal], excellent, fantabulous [informal], splendid, ripping [Brit, archaic, informal], mean [informal], outstanding, lush [Brit, informal], brilliant, beezer [UK, archaic], stellar [informal], awesome [informal], top-drawer, dope [N. Amer, informal], socko [N. Amer, informal], righteous [US, slang], fab [Brit, informal], crucial [slang], rad [N. Amer, slang], radical [N. Amer, slang], nang [Brit, slang], phat [slang], legit [US, slang], awesomesauce [informal], amazeballs [informal], beaut [Austral, NZ, informal], lit [US, slang], storming [Brit, informal], blinding [Brit, slang], stonking [Brit, informal], brill [Brit, informal], wicked [slang], cushty [Brit, informal], def [slang], magic [Brit, slang], smokin' [slang], smoking [slang], sick [N. Amer, slang]

Derived forms: first classes

See also: super-duper [informal], superior

Type of: accommodation, high quality, mail, superiority

Encyclopedia: First class