To calculate precisely and settle accounts or differences; used for fare adjustments, expense settlement, etc.
改札で運賃を精算してください。
Please adjust/settle your fare at the ticket gate.
出張の交通費は領収書を添えて精算します。
Business travel expenses will be settled with receipts attached.
月末に経理が請求書を精算した。
The accounting department settled the invoices at the end of the month.