As a Noun: 1. The quality of being important, necessary or significant in a particular situation. English = importance. As a Verb or Adjective: 1. To be very significant, valuable, or necessary. English = (be) important, (be) vital. 2. Of something, to be more important or better than other things of its kind. English = (be) special, (be) exceptional, (be) outstanding. As Modifier: 1. Used in a phrase to indicate that what you are saying applies more to one thing or situation than to any other. English = especially.