What do you mean by bug in software testing?

When the result of the software application or product does not meet with the end user expectations or the software requirements then it results into a Bug or Defect. These defects or bugs occur because of an error in logic or in coding which results into the failure or unpredicted or unanticipated results. read more

A software bug is a problem causing a program to crash or produce invalid output. The problem is caused by insufficient or erroneous logic. A bug can be an error, mistake, defect or fault, which may cause failure or deviation from expected results. read more

A bugs report or defects report is a list of bugs found out by testers while testing a software product in testing phase under a testing environment. The test environment is created at development site similar to the actual environment in which the software is supposed to work or run in live situation at customer site. read more