'a priori'=df

First the notion of a prioricity is a concept of epistemology. I guess the traditional characterization from Kant goes something like: a priori truths are those which can be known independently of any experience. — Saul Kripke, Naming and Necessity

'actors'=df

Actors are essentially emotion-producing instruments, and some are always tuned and ready while others will reach a fantastic pitch on one take and never equal it again, no matter how hard they try. — Stanley Kubrick

'analytic statements'=df

Leibniz spoke of the truths of reason as true in all possible worlds. Picturesqueness aside, this is to say that the truths of reason are those which could not possibly be false. In the same vein we hear analytic statements defined as statements whose denials are self-contradictory. — W.V.O. Quine, "Two Dogmas of Empiricism"

A statement is analytic when it is true by virtue of meanings and independently of fact. — W.V.O. Quine, "Two Dogmas of Empiricism"

'antiessentialism'=df

In order to attack that notion [the notion that knowing X is a matter of being related to something intrinsic to X, whereas using X is a matter of standing in an extrinsic, accidental, relation to X], they need to break down the distinction between intrinsic and extrinsic — between the inner core of X and a peripheral area of X which is constituted by the fact that X stands in certain relations to the other items which make up the universe. The attempt to break down this distinction is what I shall call antiessentialism. — Richard Rorty, "A World without Substances or Essences"

'art'=df

There really is no such thing as Art. There are only artists. Once these were men who took coloured earth and roughed out the forms of a bison on the wall of a cave; today some buy their paints, and design posters for the hoardings; they did and do many other things. There is no harm in calling all these activities art as long as we keep in mind that such a word may mean very different things in different times and places, and as long as we realize that Art with a capital A has no existence. — E. H. Gombrich, The Story of Art

'beauty'=df

We call ‘beauty’ that which pleases us without evoking in us desire. — Leo Tolstoy, "What Is Art?"

'clearness'=df

To attain perfect clearness in our thoughts of an object, then, we need only consider what sensations we are to expect from it, and what reactions we must prepare. — William James, Pragmatism