As a Noun: 1. The action of talking about something that you have done or that you own in a way that shows that you are proud of it. English = boast. 2. The feeling of pride in yourself (often without good reason or to an unreasonable extent) and your supposed achievements and qualities. English = vanity. As a Verb or Adjective: 1. To talk about something that you have done or that you own in a way that shows that you are proud of it. English = boast, brag. 2. To think very highly of yourself, often without good reason, and in such a way as to displease other people. English = love oneself, (be) vain.