Mark for Definition 1 of 3Pro Tip 1/3Practical Labeling Use 'mark for' when sorting or organizing things to show their future use or destination. We should mark these boxes for storage. Pro Tip 2/3Preparatory Action 'Mark for' often precedes actions like 'removal' or 'review' to initiate a process. The technician will mark the equipment for repairs. Pro Tip 3/3Visual Indication The phrase frequently implies using a visual sign, like a sticker or a line. Mark the defective products for return with chalk.