the.com/space elevator

means A hypothetical structure—a cable stretching from Earth's surface to beyond geostationary orbit—that would let cargo and people ride up into space instead of being blasted there on a rocket.

from A conceptual rather than linguistic coinage: the idea traces to the 1890s, when Konstantin Tsiolkovsky imagined a tower reaching to a 'celestial castle' in geostationary orbit, inspired partly by the Eiffel Tower. The term itself 'space elevator' settled into use through 20th-century science fiction and engineering papers, simply compounding 'space' with the ordinary mechanical 'elevator'—a word from Latin 'elevare,' to lift up. The concept stayed science fiction because no material strong enough for the cable existed until the late 20th century, when carbon nanotubes gave it a sliver of real-world plausibility.