Caution/ˈkɔːʃn/ Definition 1 of 3Pro Tip 1/3Physical Handling Use 'caution' to describe careful physical actions with objects. The glasses are fragile; please use caution. Pro Tip 2/3Metaphorical Use 'Caution' can be about thinking and decision-making, not just physical actions. You should exercise caution when accepting offers from strangers. Pro Tip 3/3Emotional Subtlety The word implies a mild sense of worry or concern. She regarded his sudden change of plans with caution.