Abstract
If we consider the widely varying approaches to languages, we find one thing that is shared by almost all: namely the use of features. They have a central place in theoretical syntax and morphology, and are the subject of major typological generalizations. Although features underpin a good deal of what we do in linguistics, they have been neglected: they are used in inconsistent ways, without sufficient attention to the logic of their use and the variety of their meanings. The course will therefore consider why features are so important in linguistics, and set out the different types of feature. We then consider the basic and challenging issue of how we establish the features and values of a particular language. We then have to ask whether and how we can compare features across languages. We whall analyse particularly the genuinely morphosyntactic features (number, gender, person, case, and in rare instances definiteness and respect), since these are in many ways the most interesting. We shall see that they do indeed offer interesting typological patterns, while also displaying remarkable diversity.