1.
skyscraper; high-rise building
A very tall building, typically in a major city. The kanji literally mean "sky-scraping tower" (摩 rub/scrape + 天 sky/heaven + 楼 tower). A somewhat literary or dramatic word compared to the more neutral 高層ビル.
Usage
A literary and evocative word often used in descriptions of cityscapes, travel writing, and poetry. In everyday conversation, 高層ビル (high-rise building) is more common. 摩天楼 carries a sense of grandeur and awe.
Etymology
A calque (loan translation) of the English word "skyscraper." The kanji break down as: 摩 (to rub, scrape) + 天 (sky, heaven) + 楼 (tower, multi-story building).