On Tuesday, the opera star Plácido Domingo apologized to women who had accused him of sexual harassment. “I respect that these women finally felt comfortable enough to speak out, and I want them to know that I am truly sorry,” he said.

“I accept full responsibility for my actions,” he added.

But on Thursday, as some of Europe’s leading opera houses considered canceling his future engagements, Mr. Domingo said he wanted to “correct the false impression” his statement had created.

“My apology was sincere and wholehearted,” he said. “But I know what I haven’t done, and I will deny it again.”

“I have never behaved aggressively toward anybody, nor have I ever done anything to obstruct or hurt the career of anybody,” he continued. “On the contrary, I have dedicated a large part of my half-century in the world of opera to helping the industry and to promoting the career of innumerable singers.”