Computing (FOLDOC) dictionary
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programming A property of a data-object that can exist in
many shapes and sizes, but not simultaneously; which
distinguishes it from a
union. It is often implemented as a
set of
classes (or structs) derived from a common
baseclass (or with a common header, as in the case of structs),
typically without any
methods.
[Clarification?]
(1996-01-07)