Interdimensional rift
From Memory Alpha, the free Star Trek reference
An interdimensional rift is a type of spatial anomaly that allows passage between different dimensions and realities.
In 2373, Seven of Nine and other drones seized control of USS Voyager and sent it through an interdimensional rift into fluidic space, the domain of Species 8472, in order to force Janeway's hand in helping the Borg. (VOY: "Scorpion")
