TIdDICTDefineEvent specifies the event type for the DICT DEFINE command, and is used by the OnCommandDefine event handler to perform a search for the specified word in the indicated database(s).
Database may contain a name in the form returned by the DICT SHOW DB command, or one of the following wildcard characters:
"!" - Search all databases until a match is found.
"*" - Search the current database for all matching entries.