As a precaution against something that might happen, though it's unlikely or uncertain.
This phrase developed in the 19th century from legal language, where 'in case' meant 'in the event that.' The addition of 'just' softened the formality and made it more conversational. It reflects human tendency toward preparedness and risk management in everyday situations.
This phrase reveals our fascinating relationship with uncertainty—we acknowledge something probably won't happen while simultaneously preparing for it. It's a linguistic manifestation of the human survival instinct, packaged in casual, everyday language that makes prudence seem effortless.
Complete word intelligence in one call. Free tier — 50 lookups/day.