Question: Here is one sentence: In a static system oil can not be replaced by water on a surface.
Here is another sentence: A vast system of production and distribution and consumption keep the country going.
Does the system mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Does my policy cover accidental loss?
Here is another sentence: The insurance won't cover this.
Does the cover mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: He was ejected for protesting the call.
Here is another sentence: I received several calls today.
Does the call mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Ply your wits!
Here is another sentence: He plied his trade as carpenter for forty-three years.
Does the ply mean the same thing in the two sentences?

Answer:
the same meaning