What is the meaning of stuffy?

adjective

• Lacking fresh air.
  • usage: "a dusty airless attic"; "the dreadfully close atmosphere"; "hot and stuffy and the air was blue with smoke"
  • synonyms: airless, close, unaired
• Excessively conventional and unimaginative and hence dull.
  • usage: "why is the middle class so stodgy, so utterly without a sense of humor"; "a stodgy dinner party"
  • synonyms: stodgy
• Affected with a sensation of stoppage or obstruction.
  • usage: "a stuffy feeling in my chest"