Meaning of the word apse in English

What does apse mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

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US /æps/
UK /æps/
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Noun

a large semicircular or polygonal recess in a church, arched or with a domed roof, typically at the eastern end, and usually containing the altar.

Example:
The choir stood in the apse, their voices echoing through the church.
Many ancient Roman basilicas featured a prominent apse.