Problem: Sentence1: He put his coat over the back of the chair and sat down.
Sentence2: All I need to weather a snowstorm is hot coffee, a warm fire, a good book and a comfortable chair.
Q: Does the term chair mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: Putting them in readiness.
Sentence2: "A happy readiness of conversation" -- Jane Austen.
Q: Does the term readiness mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: She was opening her post.
Sentence2: Is there any post for me?
Q: Does the term post mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: The chef tasted the sauce with great satisfaction.
Sentence2: He enjoyed the dish with great satisfaction. He'll order it again the next time he arrives.
Q: Does the term satisfaction mean the same thing in both these sentences?

Answer:
different meanings