Q: Does the word "left" mean the same thing in "The political left is not holding enough power." and "Jab with your left."?

A: different meanings

Q: Does the word "masquerade" mean the same thing in "I was invited to the masquerade at their home." and "That masquerade of misrepresentation which invariably accompanied the political eloquence of Rome -- Thomas de Quincey."?

A: the same meaning

Q: Does the word "time" mean the same thing in "That's three times he's made the same mistake." and "When was the last time we went out? I don't remember."?

A: the same meaning

Q: Does the word "air" mean the same thing in "Air pollution." and "There was a tension in the air which made me suspect an approaching storm."?

A:
the same meaning