An updo is a women's hairstyle that involves "sweeping the hair" or arranging the hair into a "upstyle", usually for a special or formal occasion. There are many different styles for updos including some sleek, romantic, or "imperfectly messy" look updos.
These formal wearing hair styles also include "half - ups" and "down- dos".
A half- updo means just that! Instead of all the hair pulled up, generally just the top half is pulled away from the face and pinned back, while the rest of the hair is worn down.
A down-do is a style that is worn all down. Wether it is hair worn all down with curls or waves, or a more romantic formal braid style that is actually pinned or secured as it is worn down.