Former New York City Mayor Rudy Giuliani said Tuesday that he didn't forget about 9/11 when he claimed there were no terror attacks in the U.S. in the eight years before President Obama was elected president, and said he was only speaking in shorthand before introducing Donald Trump.

"You speak in somewhat abbreviated language. All human beings speak in abbreviated language at times," Giuliani told the New York Daily News of his comments made while introducing Republican presidential nominee Donald Trump at a rally Monday in Ohio.

While introducing Trump, Giuliani said that "under those eight years, before Obama came along, we didn't have any successful radical Islamic terrorist attack inside the United States."

Giuliani told the paper that he didn't mention the Sept. 11, 2001, terror attacks because he had only "five minutes" and was unable to "give an encyclopedic explanation" in that time.

"But will I again say things in the future that can be taken out of context or misinterpreted? Of course I will," Giuliani added. "I didn't forget 9/11. I hardly would. I almost died in it."

Giuliani, a vocal Trump supporter, took flack on social media for failing to mention the Sept. 11 attacks — the worst terror attack in U.S. history — during which he was mayor.