An action taken in advance to protect against possible danger, failure, or injury; a safeguard: followed safety precautions when using heavy machinery.
Caution practiced in advance; forethought or circumspection: a need for precaution when planning a vacation.
[Late Latin praecautiō, praecautiōn-, from praecautus, past participle of Latin praecavēre, to guard against : prae-, pre- + cavēre, to beware.]
1603, from Fr. précaution (16c.), from L.L. præcautionem (nom. præcautio), from L. præcautus, pp. of præcavere "to guard against beforehand," from præ + cavere "to be one's own guard" (see caution).