A basic or principal item, especially of food, that is regularly consumed and forms a dominant part of a diet. Rice is a staple in many Asian countries.
A U-shaped metal fastener used to hold sheets of paper together by penetrating the sheets and folding over the ends. He used a staple to attach the pages of the report.
A main or important element of something, especially a feature or product that is regularly used or produced. The staple of their business is high-quality leather goods.
Textiles: the fiber of wool, cotton, or another material considered with regard to its length and quality. Merino sheep produce a fine, long staple prized by spinners.