Question: Here is one sentence: He built himself a cabin in a hollow high up in the Appalachians.
Here is another sentence: The hollow of the hand or of a tree.
Does the hollow mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: It started to snow.
Here is another sentence: It is snowing.
Does the snow mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: Be careful when you pet that dog on the head; it may bite.
Here is another sentence: We will consider performance issues under the head of future improvements.
Does the head mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: A sense of happiness.
Here is another sentence: In the best sense charity is really a duty.
Does the sense mean the same thing in the two sentences?

Answer:
different meanings