Definitions of all right:

• adjective:   being satisfactory or in satisfactory condition

  Example: "The passengers were shaken up but are all right"

• adjective:   being in good health

  Example: "He's feeling all right again"

• adverb:   used to reinforces an assertion

  Example: "It's expensive all right"

• adverb:   in a satisfactory or adequate manner

  Example: "Held up all right under pressure"

• adverb:   sentence-initial expression of agreement