Q: Does the word "door" mean the same thing in "Education is the door to success." and "I knocked on the vice president's door."?

A: different meanings

Q: Does the word "keep" mean the same thing in "I keep my specimens under glass to protect them." and "Keep on working!"?

A: the same meaning

Q: Does the word "think" mean the same thing in "She didn't think to harm me." and "I thought for three hours about the problem and still couldn't find the solution."?

A: the same meaning

Q: Does the word "discover" mean the same thing in "The story is false, so far as I can discover." and "I discovered what to do."?

A:
the same meaning