Adjective second class has 1 sense
  1. second-class - of inferior status or quality; "a second-class citizen"; "second-class accommodations"
    Antonym: superior (indirect, via inferior)
,Adverbial second class has 1 sense
  1. second class - by second class conveyance; "we traveled second class"
,Noun second class has 3 senses
  1. second class - not the highest rank in a classification
    --1 is a kind of
    rank
  2. second class - not the highest rank in a classification
    --2 is a kind of
    inferiority, low quality
  3. Cabin class, second class - accommodations on a ship or train or plane that are less expensive than first class accommodations
    --3 is a kind of accommodation
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