n. An optical instrument consisting of a lens or combination of lenses (in some cases mirrors also) which magnifies and thus renders visible minute objects that cannot be seen by the naked eye, or enlarges the apparent magnitude of small visible bodies, so as to render possible the examination of their texture or structure.n. [capitalized] A constellation. See Microscopium.To enlarge with or as with a microscope; examine very minutely as with a microscope: as, to microscope one's faults.