Example: Physicists study both the nature of matter and the forces which govern it.
source: wordnet30
a problem(noun.cognition)
Example: Is anything the matter?.
source: wordnet30
(used with negation) having consequence(noun.attribute)
Example: They were friends and it was no matter who won the games.
source: wordnet30
written works (especially in books or magazines)(noun.communication)
Example: He always took some reading matter with him on the plane.
source: wordnet30
That of which anything is composed; constituent substance; material; the material or substantial part of anything; the constituent elements of conception; that into which a notion may be analyzed; the essence; the pith; the embodiment.(noun)
source: webster1913
verb (v)
have weight; have import, carry weight(verb.stative)