Question: Sentence 1: You were in the courtroom. What is your reaction?
Sentence 2: A bad reaction to the medicine.
Does reaction mean the same thing in these two sentences?
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Answer: the same meaning

Question: Sentence 1: Tickets are $5 per head.
Sentence 2: He is two heads taller than his little sister.
Does head mean the same thing in these two sentences?
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Answer: different meanings

Question: Sentence 1: The author gives a depressing picture of life in Poland.
Sentence 2: He had no clear picture of himself or his world.
Does picture mean the same thing in these two sentences?
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Answer:
different meanings