1. A statement, written or verbal, that introduces a topic or explains the purpose of such a communication: The author spent a great deal of time and care composing the perambulation to the first volume of his autobiography.
2. The act of proceeding in front of someone when out for a walk or other outdoor activity: On their morning perambulation, Teresa and her dog ambled one behind the other so as not to disrupt and get in the way of others who were out as well.