9 meaning

nīnĭ-lĕvən
September 11, 2001, the day on which four airliners were hijacked by terrorists for use in an attack on the U.S.: two were flown into the towers of the World Trade Center in Manhattan, one into the Pentagon, and the fourth crashed into a Pa. field.
proper name
5
5
The cardinal number nine.
symbol
4
3
September 11, 2001, the date on which two hijacked airliners were flown into the World Trade Center in New York City and another into the Pentagon. A fourth hijacked airliner crashed in open land in Pennsylvania.
noun
3
3
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