internal
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internal
Taking place within a particular organization, company, or group and not intended for the public. The opposite of 'extern' (external).
Diese Informationen sind nur für den internen Gebrauch bestimmt.
This information is intended for internal use only.
'Intern' is very often used like an adverb after a noun to limit its scope. In these cases, it is not declined, for example in 'firmenintern' (within the company) or 'abteilungsintern' (within the department).
Das Problem wurde abteilungsintern gelöst.
The problem was solved within the department.
The context makes the meaning clear. If it is about a company, an organization, or a group, 'intern' means non-public or internal. In connection with medicine, doctors, or hospitals, it refers to the internal organs.
Das Memo war nur für interne Mitarbeiter gedacht.
The memo was intended only for internal staff.
Common combinations are 'interner Gebrauch' (internal use), 'interne Kommunikation' (internal communication), 'eine interne Angelegenheit' (an internal matter), or 'eine interne Untersuchung' (an internal investigation).
Nach dem Vorfall wurde eine interne Untersuchung eingeleitet.
After the incident, an internal investigation was launched.
The meaning that refers to internal organs belongs to medical terminology. In everyday life, you will rarely hear this usage except at the doctor's office or in a hospital.
Die interne Abteilung ist auf Krankheiten wie Diabetes und Bluthochdruck spezialisiert.
The internal medicine department specializes in diseases such as diabetes and high blood pressure.
public
'öffentlich' and 'intern' are opposites when it comes to information, meetings, or decisions. 'öffentlich' means that something is visible or accessible to many people. 'intern' means that something stays only within a company, organization, or group. So 'eine öffentliche Mitteilung' (a public announcement) is meant for everyone, while 'eine interne Mitteilung' (an internal message) is only for the organization’s own people.
Diese Zahlen bleiben intern, weil sie noch nicht geprüft sind.
These figures will remain internal because they have not been checked yet.
Der Chef hat die neuen Pläne erst nach der Sitzung öffentlich gemacht.
The boss only made the new plans public after the meeting.