As a Noun: 1. An extremely short period of time. English = instant, moment. As a Verb or Adjective: 1. To last an extremely short period of time. 2. To last for a short time. English = (be) temporary. As Modifier: 1. Used next to a verb or phrase to mean the action lasts only for an extremely short period of time. English = briefly, momentarily. 2. Used between phrases or clauses to mean the second action occurs an extremely short period of time after the first. English = and then suddenly, straight away, shortly after.