diff --git a/Doc/glossary.rst b/Doc/glossary.rst
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -158,6 +158,10 @@
       the documentation for :ref:`function definitions <function>` and
       :ref:`class definitions <class>` for more about decorators.
 
+   deep copy
+      A way of copying that creates a new copy of the container and of all
+      its elements recursively.  See also :term:`shallow copy`.
+
    descriptor
       Any object which defines the methods :meth:`__get__`, :meth:`__set__`, or
       :meth:`__delete__`.  When a class attribute is a descriptor, its special
@@ -762,6 +766,12 @@
       mapping rather than a sequence because the lookups use arbitrary
       :term:`immutable` keys rather than integers.
 
+   shallow copy
+      A way of copying that creates a new copy of the container but not
+      of the elements.  This means that both the original container and its
+      copy will contain references to the same elements.  See also
+      :term:`deep copy`.
+
    single dispatch
       A form of :term:`generic function` dispatch where the implementation is
       chosen based on the type of a single argument.