Question: Sentence 1: Open the door a crack.
Sentence 2: There was a crack in the mirror.
Does crack mean the same thing in these two sentences?
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Answer: different meanings

Question: Sentence 1: A bird will not learn its song unless it hears it at an early age.
Sentence 2: I love hearing the song of canary birds.
Does song mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: The base of the triangle.
Sentence 2: The attack wiped out our forward bases.
Does base mean the same thing in these two sentences?
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Answer:
different meanings