Q: Does the word "world" mean the same thing in "People are dying of starvation all over the world." and "All the world loves a lover."?

A: the same meaning

Q: Does the word "readiness" mean the same thing in "Putting them in readiness." and ""A happy readiness of conversation" -- Jane Austen."?

A: different meanings

Q: Does the word "leave" mean the same thing in "He took his leave." and "The applicant now seeks leave to appeal and, if leave be granted, to appeal against these sentences."?

A: different meanings

Q: Does the word "get" mean the same thing in "She didn't get the joke." and "She got a bruise on her leg."?

A:
different meanings