Definitions of approval:

• noun:   a message expressing a favorable opinion

  Example: "Words of approval seldom passed his lips"

• noun:   a feeling of liking something or someone good

  Example: "Although she fussed at them, she secretly viewed all her children with approval"

• noun:   acceptance as satisfactory

  Example: "He bought it on approval"

• noun:   the formal act of giving approval

  Example: "His decision merited the approval of any sensible person"