vacancyEnglishOxford New American Dictionaryvacancy /ˈvākənsē, ˈveɪkənsi / ▸ noun (plural vacancies) 1 an unoccupied position or job: a vacancy for a shorthand typist. ▪ an available room in a hotel or other establishment providing accommodations. 2 empty space: Cathy stared into vacancy, seeing nothing. ▪ Crystallography a defect in a crystal lattice, consisting of the absence of an atom or an ion from a position where there should be one. 3 lack of intelligence or understanding: vacancy, vanity, and inane deception.