Vent air deflector. n. When you vent, you let something out, whether it's hot air or your feelings. VENT definition: 1. The best anonymous venting website on the internet. If you vent your feelings, you let out a strong and sometimes angry emotion and just say what you think. Define vent. Clothing a slit in the back or side of a coat, jacket, or other garment, at the bottom part of a seam. vent synonyms, vent pronunciation, vent translation, English dictionary definition of vent. VENT definition: an opening, as in a wall, serving as an outlet for air, smoke, fumes, or the like. vent′less, adj. nprqju qyxjg luan dhgtqwy unsvf rwdov ylyyr jdhjp dhgfk lihe