(baseball) Being a pitch thrown at a slower speed than a fastball, such as a change-up.

(physics) The velocity equal to one Planck length per Planck time; equal to the speed of light. Symbol is v_P or c.

(informal) Anything that is extremely fast and reckless.

speed bump

A section of a roadway where speeds of vehicles are monitored by authorities.

plural of speed hump

plural of speed demon

plural of speed trap

plural of speed camera

(attributive, of a transmission) Having four forward speeds. / A vehicle with a transmission that has four forward speeds. It might or might not be a manual transmission.