second class

Short definition from Wiktionary

Adjective

1. 1
   Alternative spelling of second-class.
2. 2
   Of a standard or grade one level below the best.
3. 3
   Inferior in quality or standing.

Noun

1. 1
   The second-lowest rank in the Boy Scouts of America, between tenderfoot and first class.
2. 2
   A class of travel, inferior to first class.
3. 3
   A class of postage with delivery times slower than first class.