"An error condition that will divert a program's flow of control to an exception handler or to the calling program. PL/SQL supports both built-in system exceptions and programmer-defined exceptions. Exceptions may be named or unnamed." (Bill Pribyl & Steven Feuerstein, "Learning Oracle PL/SQL", 2001)
"An object that is passed from the area of code where a problem occurs to the part of the code that is going to handle the problem." (Jesse Liberty, "Sams Teach Yourself C++ in 24 Hours" 3rd Ed., 2001)
"A runtime error-reporting mechanism that requires programs to handle raised exceptions or have their stack unwound until each exception is handled (caught) or the thread terminates." (Damien Watkins et al, "Programming in the .NET Environment", 2002)
"Allows you to catch and manage runtime and other errors while programming. Managed with rescue, ensure, and raise. Compare with error." (Michael Fitzgerald, "Learning Ruby", 2007)
"a condition that violates one or more preconditional invariants; a kind of event sent to indicate such a violation." (Bruce P Douglass, "Real-Time Agility: The Harmony/ESW Method for Real-Time and Embedded Systems Development", 2009)
"Object that represents some kind of error such as an attempt to divide by zero or an attempt to parse a string that has an invalid format." (Rod Stephens, "Stephens' Visual Basic® Programming 24-Hour Trainer", 2011)
"A fancy term for an error." (Jon Orwant et al, "Programming Perl" 4th Ed., 2012)
"A condition or event that cannot be handled by a normal process." (IBM, "Informix Servers 12.1", 2014)
"An error that prevents the program from continuing unless handled by the software." (Matt Telles, "Beginning Programming", 2014)
"An unexpected condition in a program such as a divide by zero or trying to access a missing file. If the code doesn’t catch and handle the exception, the program crashes." (Rod Stephens, "Beginning Software Engineering", 2015)
"Associated with an unusual, sometimes unpredictable event, detectable by software or hardware, which requires special processing; the event may or may not be erroneous" (Nell Dale et al, "Object-Oriented Data Structures Using Java" 4th Ed., 2016)
"A signal that some unexpected condition has occurred in the program. In Java, exceptions are objects that are subclasses of Exception or Error (which themselves are subclasses of Throwable). Exceptions in Java are “raised” with the throw keyword and handled with the catch keyword. See also catch, throw, and throws." (Daniel Leuck et al, "Learning Java" 5th Ed., 2020)
