Question: Here is one sentence: That guy keeps interrupting the concert. Throw the bum out!
Here is another sentence: Fred is becoming a bum -- he's not even bothering to work more than once a month.
Does the bum mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: In the year 1920.
Here is another sentence: I was born in the year 1950.
Does the year mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: To carry well, i.e. to hold the head high, with arching neck.
Here is another sentence: This theory holds for all irrational numbers.
Does the hold mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Good extension comes from a combination of training and native ability.
Here is another sentence: Extension of the program to all in need.
Does the extension mean the same thing in the two sentences?

Answer:
different meanings