Meanings
apparatus, device, machine (complex instrument)
apparat, apparatus (organisation, especially bureaucratic)
the entirety of an editor's critical notes to a text, (loosely also) other appended information, such as indices etc.
accessory; appliance; apparatus
Mit diesem Apparat misst man die Stromstärke.
Examples
GermanEnglish
Ein gewisser Herr Braun ist am Apparat.It's a phone call from a Mr Brown.
Wer ist bitte am Apparat?Who's calling, please?