Vent An opening designed to allow the escape of vapor or the introduction of air from a tank. See also Vapor vent. By rhys|2014-10-07T19:24:38+00:00October 7th, 2014|Comments Off on Vent Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkXingEmail About the Author: rhys