1 sentence for 校 (xiào — field officer)

1. 将、校、尉是军队的主要军衔等级。

   jiàng, xiào, wèi shì jūn​duì de zhǔ​yào jūn​xián děng​jí.

   General, field, and company officers are the primary officer ranks in the military.

   Source: Dong Chinese Dictionary