Geleider

Geleider is a Dutch noun with several related uses. In everyday language, it refers to a person who guides or leads others, for example a supervisor or guide in a group activity. In practice, more common terms such as gids (guide) or begeleider (supervisor or mentor) are used, depending on context.

In science and technology, geleider denotes a material or component that conducts energy, most often electricity. Een elektrische geleider is a conductor, as opposed to een isolator (insulator). Conductors include metals such as koper (copper) or staal (steel). The term can also describe devices that provide a path for waves or particles, such as guiding structures in optics or signal transmission.

Etymology: geleider is formed from the verb leiden (to lead) with the agent suffix -er, yielding a word meaning 'the one who leads' or 'the guide.' The sense of guiding or conduction is reflected in both social and technical uses.

See also: leiding (lead, conduct), geleiding (guidance/conduction).