adjective

 

not fast moving, happening, or doing something without much speed

 

clock If a clock is slow, it shows a time that is earlier than the correct time.

 

business If business is slow, there are few customers.

 

not clever not quick at learning and understanding things

 

not exciting not exciting

I find his films very slow.

 

verb

 

to become slower or to make something become slower

The car slowed to a halt (= moved more and more slowly until it stopped).