Great in number; very numerous; a large number of(adjective)
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Use "so many" in a sentence
"Mercier's home was a huge white place with landscaped gardens and so many rooms that a search party would have to be organized if anybody got lost on the way to the bathroom."
"And it worries me that, as with so many other things that flood our in-boxes without invitation or trackable source, the information is being widely discounted as completely baseless."
"When Ober, Thayer & Moss took a case, they brought so many lawyers with them to court that there was barely enough room for the jury."