Definitions of anger:

• noun:   a strong emotion; a feeling that is oriented toward some real or supposed grievance
• noun:   the state of being angry
• noun:   belligerence aroused by a real or supposed wrong (personified as one of the deadly sins)
• verb:   make angry

  Example: "The news angered him"

• verb:   become angry

  Example: "He angers easily"

• name:  A surname (very rare: popularity rank in the U.S.: #23254)