notice - advance notification (usually written) of the intention to withdraw from an arrangement or contract; "we received a notice to vacate the premises"; "he gave notice two months before he moved"

marching orders, walking papers - (informal) a notice of dismissal or discharge

superannuation - the act of discharging someone because of age (especially to cause someone to retire from service on a pension)

ending, termination, conclusion - the act of ending something; "the termination of the agreement"

conge - an abrupt and unceremonious dismissal

removal - dismissal from office

deactivation, inactivation - breaking up a military unit (by transfers or discharges)

dishonorable discharge - a discharge from the United States Army for a grave offense (as sabotage or espionage or cowardice or murder)

Section Eight - a discharge from the US Army based on unfitness or character traits deemed undesirable