This book argues that Aristotle offers us a consistent theory of definition, according to which a particular type of definition – one which states the formal cause of a simple item – is fundamental. It begins by considering definitions as indemonstrable first principles in demonstrations, and inquires how such definitions can have the certainty required by that role. Later chapters look to the Metaphysics to understand how the unity of definitions guarantees their certainty, and to the Topics to discover why definitions must be formulated in terms of the genus and differentia(e) of the object defined. This work contributes to our understanding of the connection between the function of definition in demonstration and its character as a statement of essence.

This is a book about Aristotle's philosophy of language, interpreted in a framework that provides a comprehensive interpretation of Aristotle's metaphysics, philosophy of mind, epistemology and science. The aims of the book are to explicate the description of meaning contained in De Interpretatione and to show the relevance of that theory of meaning to much of the rest of Arisotle's philosophy. In the process Deborah Modrak reveals how that theory of meaning has been much maligned.

What is the relation between time and change? Does time depend on the mind? Is the present always the same or is it always different? Aristotle tackles these questions in the Physics, and Time for Aristotle is the first book in English devoted to this discussion. Aristotle claims that time is not a kind of change, but that it is something dependent on change; he defines it as a kind of 'number of change'. Ursula Coope argues that what this means is that time is a kind of order (not, as is commonly supposed, a kind of measure). It is universal order within which all changes are related to each other. This interpretation enables Coope to explain two puzzling claims that Aristotle makes: that the now is like a moving thing, and that time depends for its existence on the mind. Brilliantly lucid in its explanation of this challenging section of the Physics, Time for Aristotle shows his discussion to be of enduring philosophical interest.

The first collection of essays on Aristotle's philosophy of human nature, covering the metaphysical, biological and ethical works.

Aims to explain as carefully as possible Aristotle's account of place given in the Physics, Book IV, Chs. 1-5. Also aims to rehabilitate it as a piece of philosophy, after many centuries of its being dismissed as inadequate. Discusses the importance of the concept of place to natural philosophy, including the role of so-called 'natural' places in the explanation of the natural motion of the elements.

Christian Pfeiffer explores an important, but neglected topic in Aristotle's theoretical philosophy: the theory of bodies. A body is a three-dimensionally extended and continuous magnitude bounded by surfaces. This notion is distinct from the notion of a perceptible or physical substance. Substances have bodies, that is to say, they are extended, their parts are continuous with each other and they have boundaries, which demarcate them from their surroundings. Pfeiffer argues that body, thus understood, has a pivotal role in Aristotle's natural philosophy. A theory of body is a presupposed in, e.g., Aristotle's account of the infinite, place, or action and passion, because their being bodies explains why things have a location or how they can act upon each other. The notion of body can be ranked among the central concepts for natural science which are discussed in Physics III-IV. The book is the first comprehensive and rigorous account of the features substances have in virtue of being bodies. It provides an analysis of the concept of three-dimensional magnitude and related notions like boundary, extension, contact, continuity, often comparing it to modern conceptions of it. Both the structural features and the ontological status of body is discussed. This makes it significant for scholars working on contemporary metaphysics and mereology because the concept of a material object is intimately tied to its spatial or topological properties.

In it, Aristotle offers an account of what he calls "poetry" (a term which in Greek literally means "making" and in this context includes drama - comedy, tragedy, and the satyr play - as well as lyric poetry and epic poetry). They are similar in the fact that they are all imitations but different in the three ways that Aristotle describes: 1. Differences in music rhythm, harmony, meter and melody. 2. Difference of goodness in the characters. 3. Difference in how the narrative is presented: telling a story or acting it out. In examining its "first principles," Aristotle finds two: 1) imitation and 2) genres and other concepts by which that of truth is applied/revealed in the poesis. His analysis of tragedy constitutes the core of the discussion. Although Aristotle's Poetics is universally acknowledged in the Western critical tradition, "almost every detail about his seminal work has aroused divergent opinions."

Laura Castelli presents a new translation of the tenth book (Iota) of Aristotle's Metaphysics, together with a comprehensive commentary. Castelli's commentary helps readers to understand Aristotle's most systematic account of what it is for something to be one, what it is for something to be a unit of measurement, and what contraries are.

Michael T. Ferejohn presents a new analysis of Aristotle's theory of explanation and scientific knowledge, in the context of its Socratic roots. Ferejohn shows how Aristotle resolves the tension between his commitment to the formal-case model of explanation and his recognition of the role of efficient causes in explaining natural phenomena.

The idea that some parts of reality are fundamental and others derivative was an important one in Aristotle's philosophical system, and is now again of great current interest in philosophy. Michail Peramatzis presents a new account of priority relations in Aristotle's metaphysics, and draws out their continuing philosophical significance.