The second decade of a century: the 1910s, 2010s, etc. The teens, the oneties. Short for the nineteen-tens, twenty-tens, etc.(noun)
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Use "tens" in a sentence
"For the first time, in tens of years, Egyptians can see an American president who is not eager to establish a relationship with the Egyptian regime regardless of its black record of practices against democracy and human rights."
"In China, for instance, the State Tobacco Monopoly Administration oversees all aspects of the industry, including tobacco production and distribution, and brings in tens of millions of dollars in revenue a year."
"Indeed … indeed … and no doubt, a proper lack of home furnishings results in tens of thousands of unnecessary deaths a year, and is one of the leading causes of bankruptcy, to boot!"