
der Bereich
area
A defined geographic area, zone, or region.
Der Eingangsbereich des Museums wurde neu gestaltet.
The entrance area of the museum was redesigned.
area / field
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area
A defined geographic area, zone, or region.
Der Eingangsbereich des Museums wurde neu gestaltet.
The entrance area of the museum was redesigned.

field
A particular field, subject area, or sector of business or science.
Sie ist eine anerkannte Expertin im Bereich der Softwareentwicklung.
She is a recognized expert in the field of software development.

area of responsibility
The scope of responsibilities, tasks, or influence; an area of responsibility.
Die Personalplanung fällt nicht in meinen Bereich.
Staff planning does not fall within my area of responsibility.

range
In mathematics, the set of all possible input or output values of a function (domain or range).
Der Wertebereich der Sinusfunktion liegt zwischen -1 und 1.
The range of the sine function lies between -1 and 1.
The most common construction is 'im Bereich' (in the area/field). To give an approximate figure, especially with numbers, you use 'im Bereich von' (in the range of).
Er arbeitet im sozialen Bereich.
He works in the social sector.
'Bereich' (area/field) is a very typical word for formal, official, or scientific texts. It helps to define topics, places, or responsibilities precisely.
Dieser Sachverhalt fällt in den Bereich des Zivilrechts.
This matter falls within the area of civil law.
When 'Bereich' (field) describes an abstract subject area, this is often connected with a genitive or the preposition 'von' (of).
Sie forscht im Bereich der künstlichen Intelligenz.
She researches in the field of artificial intelligence.
To assign or reject responsibility, the expression 'in jemandes Bereich fallen' (to fall within someone's area of responsibility) is often used. It is typical in professional contexts.
Die Organisation der Feier fällt in meinen Bereich.
Organizing the celebration falls within my area of responsibility.
room / space
Bereich and Raum can both refer to an abstract field of activity or subject matter. Bereich is the neutral term, while Raum tends to emphasize a framework for action, communication, or personal development and depends more strongly on particular collocations. Use Bereich for a subject field and Raum for opportunities or room for development.

Im Bereich der Bildung arbeitet die Stadt an neuen Angeboten.
In the field of education, the city is working on new services.
Das neue Zentrum bietet Jugendlichen Raum für eigene Ideen.
The new center gives young people room for their own ideas.