Here, defend means to explain or support your ideas or beliefs when others disagree. It often happens in talks or arguments.
He defends his opinion in the meeting.
She defends her answer in class.
This use means to keep yourself safe from harm, blame, or attack. It can be physical or about words and feelings.
He defended himself from the rude words.
She defends against unfair blame.
This meaning is used when someone answers or explains their ideas or actions clearly, often in official places like courts or universities.
He defended his thesis at the university.
The lawyer defends his client in court.
In this meaning, defend means to explain why an action or mistake is okay, to avoid problems or blame.
She defends her mistakes carefully.
He defends his actions to the teacher.
