Reserved keywords in Python are words that have special meaning and cannot be used as identifiers for variables, functions, or classes. These keywords are reserved for specific purposes within the Python language and cannot be redefined or reassigned. Some examples of reserved keywords in Python include 'if', 'else', 'for', 'while', 'def', and 'class'. It is important to be aware of these keywords when writing code in Python to avoid syntax errors and unintended behavior.