As a Noun: 1. Someone who is well known, especially in acting or show business. English = celebrity. 2. The state of being well known by everyone, especially for your achievements. English = fame. As a Verb or Adjective: 1. To be well known, especially in acting or show business. English = (be) famous. 2. To know something well because (i) you are clever or well educated, or (ii) it is obvious to everyone. English = know well, (be) well known.