Abstract: ACCOMMODATION David Beaver (Stanford University) Henk Zeevat (University of Amsterdam) July 2004 Chapter to appear in Ramchand, G. and C. Reiss (eds.), Oxford Handbook of Linguistic Interfaces, Oxford University Press Accommodation is an inferential process whereby hearers react to presuppositions that are not satisfied. Accommodation can be seen as an adjustment of a model of the common ground, or an adjustment to a representation of the meaning of an utterance. This handbook chapter surveys accounts of accommodation including, for example, models of Lewis, Heim and van der Sandt. We condense generalizations about accommodation into fourteen principles that are either implicit or explicit in prior literature, and discuss empirical and theoretical pros and cons of each of them. We also consider evidence that patterns of accommodation differ from trigger to trigger. We discuss alternative explanations of this phenomenon and the implications it has for the taxonomy of presupposition inducing expressions.