"Faster-than-light", also known as superluminal velocities, refers to any sort of travel at a speed greater than the speed of light. Prohibited in mainstream physics due to the Special theory of relativity.
"faster-than-light", also known as superluminal velocities, refers to any sort of travel at a speed greater than the speed-of-light. Prohibited in mainstream physics due to special-relativity. Would be possible for "tachyons", particles with imaginary mass, but tachyons indicate an unstable ground-state, due to tachyon-condensation.
Such a phenomenon is generally taken to be false, as it violates causality.
