n.

1. （樹乾、腰身等的）圍長，周長[U][C]
   a tree 10 meters in girth

   周長十米的樹

   the girth of a tree

   一棵樹的圍長

   His girth is twice as large as mine.

   他的腰身是我的兩倍大。

2. （馬、驢等的）肚帶[C]

n.

1. the measurement around the middle of something, especially a person's waist.
2. a band attached to a saddle and fastened around a horse's belly.

v.