As a Noun: 1. A lack of speed or haste so that something takes a long time to move, happen or be done. English = slowness. As a Verb or Adjective: 1. To move or happen without much speed or in a way that takes a large amount of time. English = (be) slow, go slow. As Modifier: 1. Used before or after a verb (action) sign to mean that the action happens without much speed or in a way that takes a large amount of time. English = slowly.