1Moisture or dampness present in the air or in objects; often associated with mugginess or the cause of mold.
梅雨の季節は湿気が多くて洗濯物が乾きにくい。
During the rainy season, there's a lot of humidity, so laundry doesn't dry easily.
押し入れの湿気を取るために除湿剤を置いた。
I placed a dehumidifying agent in the closet to remove the moisture.
この靴は湿気を吸うと臭くなりやすい。
These shoes tend to smell if they absorb moisture.
地下室は湿気がこもりやすいので換気が必要だ。
Basements tend to trap moisture, so ventilation is necessary.