Verification: It is a process of confirming that software
meets its specification. It involves reviews and meetings to
evaluate document, plan, code, requirement and
specifications. This is done using the checklists, issue
lists, walkthroughs and inspections.

Validation: It is a process of confirming that software
meets user's requirement. It is actual testing which takes
place after the verification is complete (code is complete).

Verification and validation go hand in hand. Every
verification activity have a corresponding validation
activity. Code verification/validation, functional,
integration verification/validation. Test case, plan and log
are used in the various phases of validation process. All
testing methods are used in validation process.

verification:nothing but a document review.
(brs,srs,hld,llds)
validation:nothing but a testingphase(unit 
testing,integration testing)

Verification involves reviews to check whether the 
application meets the clients requirements.

Validation involves checking the application by exeuting it.
that is giving something and checking for the Valid output 
according to functionality of the application

Verification:Typically involves the reveiws and meetings to
evaluate plans,docs,code requirements and
specifications.This can be done with the checklist,issue
lists,walkthroughs and inspections.

Validation:Typically involves the actual testing after
varification.Validation checks that the system meets the
customer's requirements at the end of the life cycle.