Jisho

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Noun
1. ceiling
Noun
2. ceiling price; (price) ceiling
Wikipedia definition
3. CeilingA ceiling is an overhead interior surface that covers the upper limit of a room. It is generally not a structural element, but a finished surface concealing the underside of the floor or roof structure above. Ceilings are classified according to their appearance or construction. A cathedral ceiling is any tall ceiling area similar to those in a church. A dropped ceiling is one in which the finished surface is constructed anywhere from a few inches to several feet below the structure above it.
Read “Ceiling” on English Wikipedia
Read “天井” on Japanese Wikipedia
Read “Ceiling” on DBpedia

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