Hello, you have come here looking for the meaning of the word aufmachen. In DICTIOUS you will not only get to know all the dictionary meanings for the word aufmachen, but we will also tell you about its etymology, its characteristics and you will know how to say aufmachen in singular and plural. Everything you need to know about the word aufmachen you have here. The definition of the word aufmachen will help you to be more precise and correct when speaking or writing your texts. Knowing the definition ofaufmachen, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.
Aufmachen and zumachen are not in themselves informal. However, the formal language prefers öffnen and schließen, which are in turn rare in colloquial speech (though schließen is common in compounds like abschließen, zuschließen, etc.).