Attorney at law or attorney-at-law, usually abbreviated in everyday speech to attorney, is the official name for a lawyer in certain jurisdictions, including, Japan, Sri Lanka, South Africa and the United States. (wikipedia) They are sometimes used interchangeably. However, by definition, each has a unique meaning, for details, please go to: http://www.wisegeek.com/what-is-the-difference-between-an-attorney-lawyer-barrister-and-esquire.htmSuggest edit