A sect is a group with distinctive religious, political or philosophical beliefs. Although in past it was mostly used to refer to religious groups, it has since expanded and in modern culture can refer to any organization that breaks away from a larger one to follow a different set of rules and principles. The term is occasionally used in a malicious way to suggest the broken-off group follows a more negative path than the original. The historical usage of the term "sect" in Christendom has had pejorative connotations, referring to a group or movement with heretical beliefs or practices that deviate from those of groups considered orthodox.

A sect as used in an Indian context refers to an organized tradition.

The word sect comes from the Latin noun secta (a feminine form of a variant past participle of the verb sequi, to follow), meaning "(beaten) path", and figuratively a (prescribed) way, mode, or manner, and hence metonymously, a discipline or school of thought as defined by a set of methods and doctrines. The present gamut of meanings of sect has been influenced by confusion with the homonymous (but etymologically unrelated) Latin word secta (the feminine form of the past participle of the verb secare, to cut), as sects were scissions cut away from the mainstream religion.

David Howell Evans (born 8 August 1961), more widely known by his stage name The Edge (or just Edge), is a musician best known as the guitarist, backing vocalist, and keyboardist of the Irish rock band U2. A member of the group since its inception, he has recorded 12 studio albums with the band and has released one solo record. As a guitarist, The Edge has crafted a minimalistic and textural style of playing. His use of a rhythmic delay effect yields a distinctive ambient, chiming sound that has become a signature of U2's music.

The Edge was born in England to a Welsh family, but was raised in Ireland after moving there as an infant. In 1976, at Mount Temple Comprehensive School, he formed U2 with his fellow students and his older brother Dik. Inspired by the ethos of punk rock and its basic arrangements, the group began to write its own material. They eventually became one of the most popular acts in popular music, with successful albums such as 1987's The Joshua Tree and 1991's Achtung Baby. Over the years, The Edge has experimented with various guitar effects and introduced influences from several genres of music into his own style, including American roots music, industrial music, and alternative rock. With U2, The Edge has also played keyboards, co-produced their 1993 record Zooropa, and occasionally contributed lyrics. The Edge met his second and current wife, Morleigh Steinberg, through her collaborations with the band.