Definition of individuum vagum in English:

individuum vagum

noun

rare, historical
  • Logic. Something categorized as an individual, without being identified as a particular individual or an individual of a particular kind. Also occasionally in extended use: a person or thing of no worth or substance; a cipher.

Origin

Mid 16th century; earliest use found in Thomas Cranmer (1489–1556), archbishop of Canterbury. From post-classical Latin individuum vagum from classical Latin indīviduum + vagum, neuter of vagus.