Question: Here is one sentence: I would like to introduce you to our portfolio of services.
Here is another sentence: They were disappointed by the poor returns on their stock portfolio.
Does the portfolio mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: Please reply to my letter.
Here is another sentence: He replied that he was not sure.
Does the reply mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: He sensed the presence of danger.
Here is another sentence: He tested for the presence of radon.
Does the presence mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: They were an angry lot.
Here is another sentence: Lots of people think so.
Does the lot mean the same thing in the two sentences?

Answer:
different meanings