Q: Does the word "note" mean the same thing in "It ended on a sour note." and "There was a note of gaiety in her manner."?

A: the same meaning

Q: Does the word "now" mean the same thing in "It worked up to right now." and "Now is a good time to do it."?

A: the same meaning

Q: Does the word "strike" mean the same thing in "We will strike a medal in your honour." and "Strike coins."?

A: the same meaning

Q: Does the word "dozen" mean the same thing in "There shouldn't be more than two dozens." and "Pack the shirts in dozens, please."?

A:
the same meaning