die Nische
niche
A recess or small hollow space in a wall, often used to place a statue, a vase, or another object in it.
In einer Nische im Flur stand eine antike Vase.
There was an antique vase in a niche in the hallway.

niche
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niche
A recess or small hollow space in a wall, often used to place a statue, a vase, or another object in it.
In einer Nische im Flur stand eine antike Vase.
There was an antique vase in a niche in the hallway.

You can recognize the meaning of 'Nische' (niche) from the context. If it is about architecture, you will hear words like 'Wand' (wall) or 'Statue' (statue). In a business context, terms like 'Markt' (market) and 'Produkt' (product) appear. In biology, 'Ökosystem' (ecosystem) and 'Tierart' (animal species) are typical signal words.
In der alten Kirchenmauer war eine Nische für eine Heiligenfigur. (Architektur)
There was a niche for a saint's figure in the old church wall. (architecture)
The basic idea of 'Nische' (niche) is always a small, protected, and special space. This literal meaning from architecture is transferred to business ('a special market segment') and biology ('a special habitat').
Er fühlt sich in seiner kleinen, aber feinen Nische sehr wohl.
He feels very comfortable in his small but refined niche.
In a business context, there are fixed expressions. You can say 'eine Nische finden' (to find a niche), 'eine Nische entdecken' (to discover a niche), or 'eine Nische besetzen' (to occupy a niche). Products for such a market are called 'Nischenprodukte' (niche products).
Das Unternehmen war erfolgreich, weil es eine Nische für Luxus-Tierfutter gefunden hat.
The company was successful because it found a niche for luxury pet food.
The meaning of 'Nische' (niche) in the biological sense ('ökologische Nische', ecological niche) is technical language. It is used mainly in scientific or school texts about biology and ecology.
Im Biologieunterricht lernten wir, was eine ökologische Nische ist.
In biology class, we learned what an ecological niche is.
corner
'die Ecke' and 'die Nische' can both refer to a small area in a room. 'Die Ecke' is a normal corner or area where two walls or surfaces meet. 'Die Nische' is more specific: it is a recess in the wall or a small set-back space. You can confuse them when talking about places in a room. 'Ecke' is more natural when you are simply talking about an area in the room. 'Nische' fits when the space looks like a small hollow or indentation.

Die Vase steht in einer Nische neben der Tür.
The vase is in a niche next to the door.
In der Ecke des Wohnzimmers steht ein kleiner Tisch.
There is a small table in the corner of the living room.