What does this popular saying mean?

Question

"He is four years her senior." or "He is five years her junior?"

Answer 1

Four years her senior means he is 4yrs older than she is and junior means the person is younger.

Answer 2

1. He is 4 years older  2. He is 5 years younger

Answer 3

Four years her senior means he is four years older.  Junior would be five years younger.

Answer 4

senior, older... junior younger

Answer 5

Four years her senior means he is four years older. Junior would be five years younger.

Answer 6

"He is four years her senior" means he is 4 years older than her. "He is five years her junior" means he is 5 years younger than her.