[3.13] doc: Add glossary entry for "free threading" (GH-119865) (#119874)

miss-islington · colesbury · web-flow · commit 5e8396e6841e · 2024-05-31T17:42:36.000Z
(cherry picked from commit 9bc6045) Co-authored-by: Sam Gross <colesbury@gmail.com>
diff --git a/Doc/glossary.rst b/Doc/glossary.rst
@@ -438,6 +438,12 @@ Glossary
       division.  Note that ``(-11) // 4`` is ``-3`` because that is ``-2.75``
       rounded *downward*. See :pep:`238`.
 
+   free threading
+      A threading model where multiple threads can run Python bytecode
+      simultaneously within the same interpreter.  This is in contrast to
+      the :term:`global interpreter lock` which allows only one thread to
+      execute Python bytecode at a time.  See :pep:`703`.
+
    function
       A series of statements which returns some value to a caller. It can also
       be passed zero or more :term:`arguments <argument>` which may be used in
