A sky scraper is a very tall building, usually with many floors. The term 'sky scraper' was first used in the 1880s to describe the tall buildings that were being built in New York City. The crossword solution for the term 'sky scraper' is 'SPIRE', which is a tall, slender structure that is often found on top of a building. A SPIRE is usually made of stone or metal and is often used as a decorative feature.