pub ‧ li ‧ cist /ˈpʌbləsəst, ˈpʌblɪsəst/ BrE AmE noun [countable]
[ Word Family: noun : ↑ public , ↑ publication , ↑ publicist , ↑ publicity ; verb : ↑ publicize ; adverb : ↑ publicly ; adjective : ↑ public ]
someone whose job is to make sure that people know about a new product, film, book etc or what a famous person is doing