Word for Today

Ever come across a word over and over and you don't know what it means and it bugs you to no end that you can't figure it out? Well, I do, often. So, that is why, occasionally, you will now find a Word for Today post. Today's word:

Peripatetic: (adj.) 1. of or relating to walking. 2. of or relating to the philosophy or methods of teaching of Aristotle. (n.) 1. A person who walks from place to place; itinerant. 2. A follower of the philosophy of Aristotle; Aristotelian.