Bully has 9 different meanings across 4 categories:
a hired thug
"The gang sent a local bully to intimidate their rivals, but he was quickly beaten up by two of them."
A person who is intentionally physically or emotionally cruel to others, especially to those whom they perceive as being vulnerable or of less power or privilege.
"The older student kept pushing the new kid around until he finally had enough and told a teacher what was happening."
be bossy towards
"Her big brother always bullied her when she was young"
To intimidate (someone) as a bully.
"The older student tried to bully the younger one into giving up his lunch money by standing in front of him and shouting threats."
Very good.
"The new software update is a real bully when it comes to speeding up my old computer."
Well done!
"After months of hard work and finally acing her final exam, Sarah couldn't help but feel like a real bully when she told her nervous classmates how easy the test had been."