What is Unified Command Plan?
Unified Command Plan meaning in Military terminology / glossary / dictionary is:
The document, approved by the President, that sets forth basic guidance to all unified combatant commanders; establishes their missions, responsibilities, and force structure; delineates the general geographical area of responsibility for geographic combatant commanders; and specifies functional responsibilities for functional combatant commanders. Also called UCP. See also combatant command; combatant commander.
Source: JP 1