Definition of: classify

(klas′ə fī) v.t. ·fied, ·fy·ing
1. To arrange or put in a class or classes on the basis of resemblance or differences.
2. To declare or designate as of aid to an enemy and restrict as to circulation or use, as a document, weapon, or item of information. [<L classis class + -FY]
—clas′si·fi′a·ble adjective
—clas′si·fi′er noun