Q: Does the word "be" mean the same thing in "When will the meeting be?" and "The dog was drowned by the boy."?

A: the same meaning

Q: Does the word "post" mean the same thing in "If you hurry you'll catch the post." and "Is there any post for me?"?

A: different meanings

Q: Does the word "set" mean the same thing in "The set of prime numbers is infinite." and "The set of his mind was obvious."?

A: different meanings

Q: Does the word "raise" mean the same thing in "Raise a family." and "Chew with your mouth shut -- were you raised in a barn?"?

A:
the same meaning