A building with one level. To save confusion in the UK, it's written as "storey", different to a historical or fictional "story".

As an adjective for a building it means only one floor. There is no upstairs. Here's a one-story home. http://www.shutterstock.com/pic-32930596/stock-photo-one-story-residential-home-with-vinyl-siding-on-the-facade-and-a-brick-foundation.html

One story = one children's story like Alice in Wonerland One storey= a one level building or house

Would you give a sentence, please?