A transwarp conduit is a artificial construction that allows travel over great distances. The opening of a conduit is known as a transwarp aperture. Between 2373 and 2374, the Borg created a transwarp conduit to the Gamma Quadrant in preparation for an invasion of the Dominion. Their early attempts were stymied by an attack on the assimilated USS Valkyrie by the Jem'Hadar and the emergence of Species 8472 in the Delta Quadrant. (DS9 novel: Lesser Evil)