Definitions

1. adjective

having a lot of dust or particles in the air, causing difficulty in breathing

“The room was stuffy after being closed for a week.”

2. noun

a feeling of discomfort or anxiety, often caused by a crowded or overbearing atmosphere

“The stuffy atmosphere in the elevator made me feel claustrophobic.”

3. adverb

in a stuffy manner; in an unpleasantly formal or pedantic way

“He spoke stuffily about the history of the building, using overly complex language.”