a: the substance of which a physical object is composed
b: material substance that occupies space, has mass, and is composed predominantly of atoms consisting of protons, neutrons, and electrons, that constitutes the observable universe, and that is interconvertible with energy
c: a material substance of a particular kind or for a particular purpose <vegetable matter>
d (1): material (as feces or urine) discharged from the living body (2): material discharged by suppuration :pus
a: the indeterminate subject of reality; especially: the element in the universe that undergoes formation and alteration
b: the formless substratum of all things which exists only potentially and upon which form acts to produce realities
: a more or less definite amount or quantity <cooks in a matter of minutes>
Material substance that constitutes the observable universe and, together with energy, forms the basis of all objective phenomena. Atoms are the basic building blocks of matter. Every physical entity can be described, physically and mathematically, in terms of interrelated quantities of mass, inertia, and gravitation. Matter in bulk occurs in several states; the most familiar are the gaseous (seegas), liquid, and solid states (plasmas, glasses, and various others are less clearly defined), each with characteristic properties. According to Albert Einstein's special theory of relativity, matter and energy are equivalent and interconvertible (seeconservation law).