This is the 821st most frequent Chinese word.
排
"排" means "to arrange," "to line up," or "row."
In this sentence, '排' is used as a verb meaning 'to queue' or 'to line up'.
她正在排队买票。
She is queuing to buy tickets.
Here, '排' is used as a verb meaning 'to arrange' or 'to align into a sequence'.
他们集合在一起排成一队。
They gathered together and arranged themselves in a line.
In this sentence, '排' is a noun meaning 'a row' or 'a line' referring to an arrangement of items.