Acceleration was an increase in speed or velocity. (TOS: "The Galileo Seven")
Measurements for acceleration included kilometer per second and kilometer per hour. (ENT: "Similitude"; VOY: "Elogium")
In 2369, Chief Engineer Geordi La Forge described what it would be like for a spaceship, upon entering the Borg transwarp conduit, being accelerated to a high warp velocity as "like falling into a fast moving river and being swept away by the current." (TNG: "Descent")
See also
- Acceleration curve
- Acceleration rate
- Acceleration thruster
- Gravitational acceleration