The different stages that a defect undergoes during the test life cycle of an application.
The various stages the a defect changes are
New: when a bug is found for the first time.
Open: when the bug is assigned to Test lead or Developer
Fixed : when the defect is solved
retest: when the defect is retested after fixed by the developer.
Duplicate: When the same defect is raised for more than one time by the same tester or else other
Deffered: A defect that can be fixed in the next release build or version
reject: when the developer does n't accept with tester