an adverb meaning 'in all' or 'all told'; used to indicate a total sum or count.
チケットは一人千円、締めて五人で五千円です。
Tickets are 1,000 yen per person; in all, five people is 5,000 yen.
締めて三時間の会議で、結論が出た。
All told it was a three-hour meeting, and a conclusion was reached.
締めて百名を超える参加者が集まった。
In all, more than one hundred participants gathered.