Sixty-four-year-old Anthony Novellino of Denville is facing murder and weapons charges.
The Daily Record of Parsippany reports that Novellino entered his plea Wednesday in state Superior Court in Morristown.
He could face life in prison without parole if convicted.
Prosecutors say Novellino attacked his wife, Judith, at their home in June. They had recently finalized their divorce, and Judith Novellino, a high school English teacher, was packing items to take to her apartment when she was stabbed.
Their adult daughter found her body the next day.
Novellino was taken into custody days later in Washington state.
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Information from: Daily Record, http://www.dailyrecord.com