A very large, not exactly counted number or amount of something. The word expresses that the amount is overwhelmingly large and is often used with 'an' and the dative.
example
Nach dem Sturm lag eine Unmenge an Ästen auf der Straße.
After the storm, a huge amount of branches was lying on the road.
Usage tips
Word structure
The prefix 'Un-' here does not simply mean 'not'; instead, it intensifies the word 'Menge' (amount/quantity) in a negative or chaotic way. An 'Unmenge' (huge amount) is therefore a huge, unmanageable amount, almost 'not a normal amount anymore'.
EXAMPLE
Nach dem Fest blieb eine Unmenge an Müll auf dem Platz zurück.
After the festival, a huge amount of trash was left on the square.
Sentence structure and usage pattern
'Unmenge' (huge amount) is almost always used with the preposition 'an' and a noun in the dative plural. The structure is: eine Unmenge an + [noun in the dative].
EXAMPLE
Wir haben eine Unmenge an neuen Bewerbungen erhalten.
We received a huge amount of new applications.
Use in the singular
The word 'Unmenge' (huge amount) is used almost exclusively in the singular. Since it already describes a huge amount, a plural form like 'Unmengen' is very rare and is used only colloquially to emphasize the enormous size even more.
EXAMPLE
Für den Umzug müssen wir eine Unmenge an Kisten packen.
For the move, we have to pack a huge amount of boxes.
Compare with
near_synonym
Unmenge vs Million
million
'Millionen' and 'die Unmenge' can both express that there is a lot of something. 'Millionen' actually names a number, but in the plural it is often also used vaguely for a huge amount. 'die Unmenge' is always vague and emphasizes that the amount is very large or almost too large. People often say 'eine Unmenge an' something. If an exact or very strong number is the focus, 'Millionen' fits. If only the large, hard-to-overview amount is important, 'Unmenge' fits better.
Unmenge
Für das Projekt hat die Chefin eine Unmenge an Unterlagen gesammelt.
The boss collected a huge amount of documents for the project.
Million
Auf dem Festival waren Millionen von Lichtern zu sehen.