Real Dictionary

wreath
countable noun: A wreath is an arrangement of flowers and leaves, usually in the shape of a circle, which you put on a grave or by a statue to show that you remember a person who has died or people who have died.

wreath in American English
a twisted band or ring of leaves, flowers, etc.
to wreathe
noun: a circular band of flowers, foliage, or any ornamental work, for adorning the head or for any decorative purpose; a garland or chaplet

wreath in British English
noun: a band of flowers or foliage intertwined into a ring, usually placed on a grave as a memorial or worn on the head as a garland or a mark of honour