The meeting took place at the Manhattan home of the casino magnate Steve Wynn, a mutual friend who brokered the get-together, according to two people briefed on the meeting and who were granted anonymity to discuss the gathering.

Mr. Trump’s campaign manager, Corey Lewandowski, described it as a “good meeting,” but did not elaborate. An aide to Mr. Wynn did not respond to an email seeking comment, and Mr. Rove similarly declined to respond.

The purpose of the meeting was unclear, although Mr. Rove is the last strategist to help elect a Republican president, and Mr. Trump is lagging organizationally for the general election.

If détente was the goal, the meeting did not appear to have a lasting effect: the morning after Mr. Trump’s freewheeling, media-bashing news conference last Tuesday, Mr. Rove was deeply critical of his performance.