The maximum possible
speed in the
Star Trek universe (not including
the original series). Between the 23rd and 24th centuries, according the the
Technical Manual, the warp curve was redrawn to be
asymptotic, increasing sharply between Warp 9 and reaching
infinity at Warp 10.
In other words, Warp 10 is unachievable by any means in the Star Trek universe. "Voyager" episodes that claim anything else are the result of crap writers who don't research their own material.