Question: Here is one sentence: In just a bit.
Here is another sentence: There are 8 bits in a byte.
Does the bit mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Every number has a unique position in the sequence.
Here is another sentence: He has an unlisted number.
Does the number mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: A course of bricks.
Here is another sentence: On a building that size, two crews could only lay two courses in a day.
Does the course mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: This will permit the rain to run off.
Here is another sentence: She permitted her son to visit her estranged husband.
Does the permit mean the same thing in the two sentences?

Answer:
different meanings