Arrangement/əˈreɪndʒmənt/ Definition 1 of 4Pro Tip 1/3Conditional Plan An 'arrangement' often implies a flexible plan that might change based on conditions. Our arrangement to see the movie depends on the weather. Pro Tip 2/3Mutual Understanding 'Arrangement' suggests a mutual understanding or expectation between parties. We have an arrangement not to bring up politics at dinner. Pro Tip 3/3Often Informal This type of 'arrangement' is less formal than a contract and often made verbally. Let's make an arrangement to split the project work.