Idiom in the vicinity of something (Definition of vicinity from the Cambridge Academic Content Dictionary © Cambridge University Press) 2 meanings: 1. a surrounding, adjacent, or nearby area; neighbourhood 2. the fact or condition of being close in space or.... Click for more definitions. If something is in your vicinity, it's in the surrounding area or nearby region — it's in the neighborhood, so to speak. If there's a garbage dump in your vicinity, you'll certainly smell it. Definition of Vicinity in the Definitions.net dictionary. Meaning of Vicinity. What does Vicinity mean? Information and translations of Vicinity in the most comprehensive dictionary definitions resource on the web.