What does 'no pun intended' mean?

Question

What does 'no pun intended' mean?

Answer 1

a pun is a play on words

so a pun is not meant to be conveyed to the audience

Answer 2

werent trying to make fun or be funny

Answer 3

It means to take the words at their literal meaning, not one that can be construed by looking at the words another way--the play on words, or making a joke.