How would you best define 'presumptuous'?

The word 'presumptuous' is best defined as being bold to the point of rudeness. It refers to a person who takes liberties or makes assumptions beyond what is considered appropriate or respectful, often acting in a way that oversteps social norms or boundaries. This behavior can be perceived as disrespectful because it shows a lack of awareness or consideration for others’ feelings or positions.

In this context, options that suggest a humble, respectful, or reserved demeanor do not align with the meaning of 'presumptuous.' The essence of the term is about overstepping bounds in a bold manner, which is why the correct choice highlights the idea of boldness coupled with a disregard for social etiquette.