1. done as a precaution; intended to prevent something undesirable from happening

Examples

• The school took precautionary measures during the storm.
• As a precautionary step, she saved her work frequently.
• The doctor prescribed antibiotics as a precautionary treatment.
• The building was evacuated as a precautionary measure.
• He wore gloves as a precautionary action while handling chemicals.
• The flight was delayed due to precautionary safety checks.