Question: Here is one sentence: If you've time to spare go by air.
Here is another sentence: I need some fresh air.
Does the air mean the same thing in the two sentences?

Answer: different meanings


Question: Here is one sentence: There's nothing more thrilling to the whale watcher than to see a whale surface and blow.
Here is another sentence: The leaves were blowing in the wind.
Does the blow mean the same thing in the two sentences?

Answer: different meanings


Question: Here is one sentence: I can't remember saying any such thing.
Here is another sentence: I remember the concert clearly, but I can't recollect why I was there.
Does the remember mean the same thing in the two sentences?

Answer: the same meaning


Question: Here is one sentence: Let's stretch for a minute -- we've been sitting here for over 3 hours.
Here is another sentence: Stretch your arms out above your head.
Does the stretch mean the same thing in the two sentences?

Answer:
the same meaning