vt to take precaution against.
2. precaution ·vt to warn or caution beforehand.
3. precaution ·noun previous caution or care; caution previously employed to prevent mischief or secure good; as, his life was saved by precaution.
4. precaution ·noun a measure taken beforehand to ward off evil or secure good or success; a precautionary act; as, to take precautions against accident.