This document provides an overview of morphology, the study of word structures and formation. It defines key morphological concepts such as morphemes, the smallest units of meaning; free and bound morphemes; affixes including prefixes, suffixes, and infixes; roots; bases; allomorphs; and word classes. Examples are given to illustrate different types of morphemes and how they combine to form words. Morphology examines how words are built up from smaller units and how their structures convey meaning.