If you dread something which may happen, you feel very anxious and unhappy about it because you think it will be unpleasant or upsetting.
I'm dreading Christmas this year...
I dreaded coming back, to be honest...
Dread is a feeling of great anxiety and fear about something that may happen.
She thought with dread of the cold winters to come.
Dread means terrible and greatly feared.
...a more effective national policy to combat this dread disease.
You can use dread to describe something that you, or a particular group of people, find annoying or undesirable.
...the dread phrase 'politically correct'.
If you say that you dread to think what might happen, you mean that you are anxious about it because it is likely to be very unpleasant.
I dread to think what will happen in the case of a major emergency...
I dread to think what Hollywood is planning to do with this interesting little story.