From Longman Dictionary of Contemporary Englishsettle up phrasal verbBBTPAY FORto pay what you owe on an account or bill We settled up and checked out of the hotel. with I’ll settle up with the bartender, then let’s go. → settle→ See Verb tableFrom Longman Business Dictionarysettle up phrasal verb [intransitive]FINANCE to pay what you owe on an account or billAfter he had collected his money, he settled up and left the hotel. → settle→ See Verb table