Definitions of matter:

• noun:   (used with negation) having consequence

  Example: "They were friends and it was no matter who won the games"

• noun:   a vaguely specified concern

  Example: "Several matters to attend to"

• noun:   a problem

  Example: "Is anything the matter?"

• noun:   written works (especially in books or magazines)

  Example: "He always took some reading matter with him on the plane"

• noun:   that which has mass and occupies space

  Example: "An atom is the smallest indivisible unit of matter"

• noun:   some situation or event that is thought about

  Example: "It is a matter for the police"

• verb:   have weight; have import, carry weight

  Example: "It does not matter much"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #13712)