die Türöffnung

1. 1

   doorway — passage to another room or space, often without a typical door

2. 2

   opening, admission — act of opening an event to its visitors

3. 3

   act of forcing open a locked door — outside of a criminal context; e.g. by emergency services or a locksmith

Forms in lighter type are derived by the standard declension rules from the nominative, genitive and plural.