the world > relative properties > kind or sort > individual character or quality > quality of being exclusive > [noun] > exclusion from a category, etc. > non-inclusion or omission > that which is (4)
(a) the action or an instance of leaving something out; (b) something left out, omitted matter.
figurative. An omission, an exception. Obsolete or dialect.
An instance of this; (concrete) a person or thing that has been omitted or passed over.
A person or thing that has been left out.