Dreams dictionary: No
Dreams dictionary: Interpretation 1
To dream that you are stating No recommends that you are going to bat for what accept despite the fact that you are conflicting with the lion's share. You are putting yourself first and settling on choices for yourself, not for others.
Dreams dictionary: Interpretation 1
To dream that you are saying no suggests that you are standing up for what believe even though you are going against the majority. You are putting yourself first and making decisions for yourself, not for others.