A "trio" refers to a group of three individuals or items that are often connected in some way. This term is commonly used in various contexts, such as music, where a musical trio consists of three musicians performing together. In literature, a trio can refer to three characters who share a significant relationship or storyline. In mathematics, a trio can describe a set of three numbers or elements that are analyzed together. The concept of a trio is also prevalent in sports, where a team may have three key players who contribute equally to their success. Overall, a trio signifies a harmonious or functional relationship among three components.