Un ascensor o elevador es un sistema de transporte vertical, diseñado para mover personas u objetos entre los diferentes niveles de un edificio o estructura. Está formado por partes mecánicas, eléctricas y electrónicas que funcionan en conjunto para ponerlo en marcha. De acuerdo a su método de funcionamiento existen dos tipos: el ascensor electromecánico y el ascensor hidráulico u oleodinámico.

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An elevator (US and Canada) or lift (UK, Australia, Ireland, New Zealand, and South Africa) is a type of vertical transportation that moves people or goods between floors (levels, decks) of a building, vessel, or other structure. Elevators are generally powered by electric motors that either drive traction cables or counterweight systems like a hoist, or pump hydraulic fluid to raise a cylindrical piston like a jack. In agriculture and manufacturing, an elevator is any type of conveyor device used to lift materials in a continuous stream into bins or silos. Several types exist, such as the chain and bucket bucket elevator, grain auger screw conveyor using the principle of Archimedes' screw, or the chain and paddles or forks of hay elevators. Languages other than English may have loanwords based on either elevator or lift. Because of wheelchair access laws, elevators are often a legal requirement in new multistory buildings, especially where wheelchair ramps would be impractical.

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