Question: Here is one sentence: She didn't touch her food all night.
Here is another sentence: The two buildings touch.
Does the touch mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Charges of opposite sign.
Here is another sentence: He posted signs in all the shop windows.
Does the sign mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Beat the cream.
Here is another sentence: Beat the egg whites.
Does the beat mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: My headache has no connection with me going out last night.
Here is another sentence: There was a connection via the internet.
Does the connection mean the same thing in the two sentences?

Answer:
different meanings