diff --git a/Help/manual/cmake-language.7.rst b/Help/manual/cmake-language.7.rst
index d590b5a4fd..908c46ceff 100644
--- a/Help/manual/cmake-language.7.rst
+++ b/Help/manual/cmake-language.7.rst
@@ -12,6 +12,8 @@ Organization
 
 CMake input files are written in the "CMake Language" in source files
 named ``CMakeLists.txt`` or ending in a ``.cmake`` file name extension.
+The term *listfile* is a general name for any such source file containing
+CMake commands that the tool processes.
 
 CMake Language source files in a project are organized into: