It usually refers to a situation where something has been stopped, but the process hasn't been completed yet. It can be used in different contexts, such as:
* Traffic: A "stop in progress" on a highway due to an accident or road work.
* Work: A "stop ongoing" in a project due to unforeseen circumstances or a lack of resources.
* Personal life: A "stop in progress" on a goal or plan, where the person has temporarily stopped working on it but intends to resume later.
The exact meaning of "arrêt en cours" will depend on the specific context.