Definition
To act pretentiously means to behave in a way that is intended to impress others by affecting greater importance, talent, culture, or intelligence than one actually possesses. It's like trying too hard to appear sophisticated or knowledgeable. Think of someone using overly complex vocabulary just to sound smart. It often involves putting on a false show. Someone acting *pretentiously* is usually trying to mask their insecurities. It can come across as phony or insincere.