(physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory | any movable articles or objects used on the set of a play or movie |
(geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry | a basic or essential property shared by all members of a class |
being twofold; a classification into two opposed parts or subclasses | a construct whereby objects or individuals can be distinguished |
| any area set aside for a particular purpose |
| something owned; any tangible or intangible possession that is owned by someone |