n.

1. （树干、腰身等的）围长，周长[U][C]
   a tree 10 meters in girth

   周长十米的树

   the girth of a tree

   一棵树的围长

   His girth is twice as large as mine.

   他的腰身是我的两倍大。

2. （马、驴等的）肚带[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.