A numbered tag or ticket handed out to indicate one's place in line; used to manage order at shops, offices, hospitals, etc.
病院の受付で番号札をもらって、ソファで待った。
I took a numbered ticket at the hospital reception and waited on the sofa.
人気のパン屋では、朝早く来た人に番号札が配られる。
At the popular bakery, numbered tags are handed out to people who arrive early in the morning.
役所の窓口は混んでいるので、まず番号札を取ってください。
The municipal office counter is crowded, so please take a numbered ticket first.