A wreath can imply some honour or celebration. It's possible you are in the midst of celebrating something in your waking life or anticipating a celebration in the near future. This could be Christmas or something totally unrelated.
If you were given a wreath in your dream, you may wish to be singled out and recognised for something you've achieved.
If you were giving someone else a wreath, it's possible that the person means a lot to you- you both have a bond that cannot be broken. Or you feel guilty for something you have done to them of late.
Wreaths can also signify happy times as they are often put out at Christmastime, so you may be looking forward to the Christmas festivities.
More negatively, a wreath can be a sign of mourning or sorrow so if you are wallowing in self-pity, it could explain why you dreamed about a wreath. Perhaps you are suffering after the loss of a loved one or something else that is no longer in your life.
A funereal wreath may seem like a bad omen but it can also mean change if you are anticipating some shifts in your waking life or alternatively, you crave them. Is there anything you can do to kick start these changes yourself?
Given the shape, it could represent feelings of completeness and continuity, if you are content in your relationship, happy in your personal time or confident in your job position. The dream could be telling you not to take it for granted.