diff --git a/Doc/glossary.rst b/Doc/glossary.rst
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -78,6 +78,10 @@
       Benevolent Dictator For Life, a.k.a. `Guido van Rossum
       <http://www.python.org/~guido/>`_, Python's creator.
 
+   bytes-like object
+      An object that supports the :ref:`bufferobjects` (e.g. :class:`bytes`,
+      :class:`bytearray`, and others).
+
    bytecode
       Python source code is compiled into bytecode, the internal representation
       of a Python program in the CPython interpreter.  The bytecode is also