What is the meaning of the word "o'casey"?

Definitions:

  1. Irish dramatist, whose plays are realistic pictures of Dublin slum life. copy to clipboard NOUN
    • Irish playright Sean O'Casey wrote The Silver Tassie to follow his famous Dublin trilogy. copy to clipboard
  2. Is an Irish surname that comes from the Gaelic word 'cathasaigh' which means 'vigilant or watchful'. copy to clipboard NOUN

Synonyms: