For most units, planning leave is like planning your vacation with a civilian job. You talk with your boss, make sure everything is covered, fill out the forms, get it approved, etc. It's not a big deal. I took a month off to go tour Europe once when I was in the Army.
defecate. 1  to void excrement from the bowels through the anus; have a bowel movement. 2  to become clear of dregs, impurities, etc. 3  to clear of dregs, impurities, etc.; purify; refine.
The discharge of feces from the rectum. [L. defaeco, pp. defecation. 1. the evacuation of fecal matter from the rectum. 2. the removal of impurities, such as chemically. defecation. the elimination of feces from the digestive tract through the rectum. Also spelled defaecation.