Question: Here is one sentence: I didn't mean to knock your tooth out.
Here is another sentence: I only meant to help you.
Does the mean mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: In the day of the dinosaurs.
Here is another sentence: In the days of the Roman Empire.
Does the day mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: Trace a pattern.
Here is another sentence: Trace the student's progress.
Does the trace mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Air pollution.
Here is another sentence: The flock of birds took to the air.
Does the air mean the same thing in the two sentences?

Answer:
the same meaning