Expo
expo
Short form of Exposition; a large, often international exhibition or world exposition.
Wir besuchen dieses Jahr die große Technik-Expo in Berlin.
We are visiting the big technology expo in Berlin this year.

expo
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expo
Short form of Exposition; a large, often international exhibition or world exposition.
Wir besuchen dieses Jahr die große Technik-Expo in Berlin.
We are visiting the big technology expo in Berlin this year.

'Expo' is a short form of the word 'die Exposition' (exposition/exhibition). For this reason, the word is feminine: 'die Expo' (the expo).
Die nächste große Expo findet in Mailand statt.
The next big expo is taking place in Milan.
The word 'Expo' is very often used as the second part of compound nouns to name the theme of the exhibition.
Am Wochenende findet eine große Auto-Expo statt.
A big car expo is taking place this weekend.
The term 'Expo' is used for large, often international trade fairs and exhibitions. It is very common in media and marketing language.
Die Weltausstellung wird oft einfach nur „die Expo“ genannt.
The world exposition is often simply called 'die Expo' (the expo).
exhibition / issuing
'die Ausstellung' and 'die Expo' can both mean an event where things are shown publicly. 'Ausstellung' is the normal and general word. It works for art, photos, technology, history, or even trade fair booths. 'Expo' is used more for a very large, often international exhibition, especially when many countries, companies, or topics are involved. Learners may confuse the words because 'Expo' sounds short and modern. In everyday language, however, 'Ausstellung' is usually more natural. 'Expo' is especially appropriate for large, well-known events.

Viele Besucher reisen zur Expo, weil dort neue Ideen aus verschiedenen Ländern gezeigt werden.
Many visitors travel to the expo because new ideas from different countries are shown there.
Die Ausstellung im Stadtmuseum zeigt alte Fotos aus der Region.
The exhibition at the city museum shows old photos from the region.