Deferred is the term used when developer fix the defect it
in next release.

Deferred situation arises in following cases.
1. When developer thinks that the defect is valid but this
change may affect the existing one.
2. When development team and testing team have an argument.
3. The first build is on high priority due to that this
defect will be moved with next build.That s why defect is
deferred.

Deffered: The bug or the functionality which is expected 
will be fined in the future build, that means it is 
postponed....

This happens due to the following reasons

1) Testers report the bug, the Developer asks for further 
requirement which the tester can't provide at that 
situation, so the bug which the tester reported will be 
deffered.

2) In another scenario, where the developer is convienced 
that this is a valid bug , but in the current realse or 
build that will not be of more important what the client is 
expecting , so the development team and the testing team 
will decide and deffer it..

3) In another scenario, if there is misunderstiding between 
the developer and the tester, what ever bug the tester 
proudces , the developer will not listen or give important 
and he will work on different bugs... so at this time also 
the bug can be deffered..