1moving or operating, or designed to do so, only at a low speed; not quick or fast:until recently diesel cars were slow and noisy a slow dot-matrix printer taking a long time to perform a specified action:she was rather a slow reader [with infinitive]:large organizations can be slow to change lasting or taking a long time:a slow process the journey home was slow not allowing or intended for fast travel:the slow lane (of a sports field or ground) likely to make the ball bounce or run slowly or to prevent competitors from travelling fast: on a slow surface both sets of bowlers bowled straight 2 [predic. or as complement] (of a clock or watch) showing a time earlier than the correct time:the clock was five minutes slow 3not prompt to understand, think, or learn:he’s so slow, so unimaginative 4uneventful and rather dull:a slow and mostly aimless narrative (of business) with little activity; slack:sales were slow 5 Photography (of a film) needing long exposure. (of a lens) having a small aperture.
6(of a fire or oven) burning or giving off heat gently:bake the dish in a preheated slow oven
at a slow pace; slowly:the train went slower and slower [in combination]:a slow-moving river
reduce one’s speed or the speed of a vehicle or process:the train slowed to a halt investment has slowed down [with object]:he slowed the car
) live or work less actively or intensely:I wasn’t feeling well and had to slow down