I am using dict.cc und PONS for searching word meaning. But it doesn't have sample sentence mentioned in it. Which dictionary is good for getting sentences as well.
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de.thefreedictionary.com – Ad Infinitum Mar 1 '17 at 13:04
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Pons provides examples from the Internet; though they're not verified by editors. – Em1 Mar 1 '17 at 13:39
https://www.dwds.de/ is a monolingual dictionary, it is the best I've ever seen on the web, it also contains etymology and - as you requeste - example sentences.
de.wiktionary.org also has example sentences and etymology.
And of course there is http://www.duden.de/ which also has example sentences and (rather few) etymological information.