What is DNS resolver

What is exactly DNS resolver means ?
What is the funtionality of this & what is the purpose of this ?
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SrikantRajeevAsked:
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bernardbrinkCommented:
Hi,
" The client-side of the DNS is called a DNS resolver. It is responsible for initiating and sequencing the queries that ultimately lead to a full resolution (translation) of the resource sought, e.g., translation of a domain name into an IP address. "
From: http://en.wikipedia.org/wiki/DNS_resolver#DNS_resolvers

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