o, b, e, n, r, i are letters that make 'O'Brien'
IE, Brie, BR, en, RI, ie, Br are words within 'O'Brien'
1 possible definitions for 'O'Brien'
Under this definition, o'brien is a noun and has the following properties:
Edna O'Brien has the same meaning as O'Brien
'O'Brien' can be considered an instance of writer, author.