Problem: Sentence1: They claimed that they had been in contact with extraterrestrial beings.
Sentence2: They forget to solder the contacts.
Q: Does the term contact mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: I have a house and a car.
Sentence2: Have an assistant.
Q: Does the term have mean the same thing in both these sentences?

Answer: different meanings

Problem: Sentence1: It just won't make much of a difference to anyone.
Sentence2: His support made a real difference.
Q: Does the term difference mean the same thing in both these sentences?

Answer: the same meaning

Problem: Sentence1: Practice makes perfect.
Sentence2: He will need lots of practice with the lines before he performs them.
Q: Does the term practice mean the same thing in both these sentences?

Answer:
the same meaning