Question: Here is one sentence: Extend my greetings.
Here is another sentence: Extend the loan.
Does the extend mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: Karma's a bitch.
Here is another sentence: My bitch just had puppies: they're so cute!
Does the bitch mean the same thing in the two sentences?

Answer: different meanings

Question: Here is one sentence: The spaceship came under the pull of the gas giant.
Here is another sentence: The pull of the moon.
Does the pull mean the same thing in the two sentences?

Answer: the same meaning

Question: Here is one sentence: The saw buckled when it hit a knot.
Here is another sentence: A small knot of women listened to his sermon.
Does the knot mean the same thing in the two sentences?

Answer:
different meanings