This document provides definitions for over 80 Japanese terms commonly used in Aikido. The terms cover aspects of Aikido techniques, ranks, etiquette, parts of the body, weapons, stances, and more. Key terms defined include Aikido, Dojo, Sensei, Nage, Uke, Rei, Waza, and many stroke names and positions. Having these terms defined in one place provides a concise reference for understanding Aikido terminology.