Question: Sentence 1: Can I have a dozen eggs, please?
Sentence 2: I ordered two dozen doughnuts.
Does dozen mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: The war on poverty.
Sentence 2: In the US, conservatives rail against the "war on Christmas".
Does war mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: Leave the room.
Sentence 2: She wants to leave.
Does leave mean the same thing in these two sentences?
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Answer:
different meanings