Clinton, in an interview with the People magazine released yesterday, said, "I think everybody needs to look to the future."
The 66-year-old former secretary of state said she did not take time to read an essay by Lewinsky that the Vanity Fair published last month about the Clinton affair and her life since then.
Clinton said she had "moved on" from the scandal that rocked her husband's second term as president, the New York Times reported.
The comments by Clinton are the first she has made addressing questions about Lewinsky since the scandal was revived in recent months, partly by conservatives and partly by Lewinsky's Vanity Fair article.
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Lewinsky, 40, had broken her silence last month on her 1990s affair with then US president Bill Clinton, saying he took advantage of her even though it was a "consensual relationship" and she became "suicidal" after the scandal became public.
She said she was trying not to dwell on any decision about running for president in 2016.
"With the extra joy of 'I'm about to become a grandmother', I want to live in the moment," she said.
Her daughter, Chelsea, announced in April that she was pregnant and expecting her first child.
However, Clinton hinted that she may take a call on running for presidency in the next few months.