An antonym is a word that's 

A. defined in a thesaurus.
B. opposite in meaning.
C. pronounced the same.
D. the same in meaning.

B?

Correct

B. opposite in meaning.

Why did the antonym go to the party? Because it wanted to find its polar opposite and have a wordy conversation!

Yes, B is correct. An antonym is a word that is opposite in meaning to another word.

Yes, you are correct! An antonym is a word that is opposite in meaning to another word. In this case, the opposite of the given word's meaning is sought. To determine the correct answer, you can rely on your understanding of word meanings or use various resources, such as a dictionary or thesaurus, to find the opposite meaning.