From Longman Dictionary of Contemporary Englishexpoex‧po /ˈekspəʊ $ -poʊ/ noun (plural expos) [countable] informalx-ref an exposition(2)
Examples from the Corpus
expo• Westech sponsors about 50 expos around the country.• The Internet expo, though, is not entirely virtual.• One dated back to 1994 and another regarded contracts from 1998 that had already been the focus of a Star expos.From Longman Business Dictionaryexpoex‧po /ˈekspəʊ-poʊ/ noun (plural expos) [countable] informal MARKETINGan expositionOrigin expo (1900-2000) exposition 