Question: Sentence 1: The song of bullets was in the air.
Sentence 2: He bought it for a song.
Does song mean the same thing in these two sentences?
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Answer: different meanings

Question: Sentence 1: That store offers a variety of products.
Sentence 2: That store offers a variety of products.
Does product mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: Keep open the possibility of a merger.
Sentence 2: Keep my seat, please.
Does keep mean the same thing in these two sentences?
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Answer:
the same meaning