stuffy

A room that's stuffy isn't well-ventilated or full of fresh air. If your classroom is stuffy, you may find it hard to concentrate. Better ask your teacher to open a window.

If your car is stuffy, it's hot and there isn't enough fresh air circulating. If your nose is stuffy, it's congested (also without enough air moving through it). When a person is stuffy, he or she is a little prim and proper, without a lot of imagination or a willingness to try new things. The very earliest meaning of this adjective, dating from about 1550, was "full of substance."

Definitions of stuffy
  1. adjective
    lacking fresh air
    “hot and stuffy and the air was blue with smoke”
    synonyms: airless, close, unaired
    unventilated
    not ventilated
  2. adjective
    affected with a sensation of stoppage or obstruction
    “a stuffy feeling in my chest”
    Synonyms:
    obstructed
    shut off to passage or view or hindered from action
  3. adjective
    excessively conventional and unimaginative and hence dull
    synonyms: stodgy
    conventional
    following accepted customs and proprieties
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