storey noun
ADJ. lower | top, upper
VERB + STOREY have The house has three storeys. | occupy The kitchen occupies the lower storey.
PREP. on a/the ~ I live on the top storey.
PHRASES 5/10, etc. storeys high The building is four storeys high.
You can also check other dicts: storey (English, 中文解释 ), wordnet sense, Collins Definition