You have read the definitions, but in real life, poor workplace behaviours can be hard to recognise and define.
Behaviour considered bullying or rudeness by one person may be considered acceptable by another.
But remember that bullying and rudeness are all about how they make the recipient or bystanders feel, not what the perpetrator perceives it to be.
A great way of challenging your interpretation of behaviours and opening your mind to what others recognise as poor behaviour, is to undertake the RCOG e-learning on Improving Workplace Behaviour.
You may also find these videos/vignettes helpful: