1. subpackage - Noun
2. subpackage - Verb
A physical package contained within another package.
(object-oriented programming) A package situated hierarchically below another package.
Antonym: superpackage
subpackage (third-person singular simple present subpackages, present participle subpackaging, simple past and past participle subpackaged)
(transitive) To place (an object) in a package which is itself inside a package.