1. properly arranged, correct and legal, appropriate
get/put/have things in order
If something is said to be 'in order' it means to follow a particular sequence or be in the correct condition for use. If something is 'in order' it can also mean it is appropriate to a particular circumstance or follows the rules of procedures or law. If you say that 'everything seems to be in order' you mean that everything is as it should be or everything is compliant with what is required. Similar in meaning to 'up to scratch'.