A "staple" refers to a basic food item that is regularly consumed and forms a significant part of a diet. Common examples of staples include rice, wheat, and corn. These foods are often inexpensive and widely available, making them essential for many cultures around the world. In addition to food, the term "staple" can also refer to a small metal fastener used to hold sheets of paper together. This type of staple is typically used with a stapler, which applies pressure to bend the ends of the staple, securing the papers in place.