precautionary

adj

1. Of, pertaining to, or serving as a precaution.

   “The port cities were quarantined as a precautionary measure, though no cases of the disease had been found.”

   “Fearing attack on the northern ports by the English, he even took precautionary measures by strengthening the defense of Shan-hai-kuan 山海關 and Ch‘in-huang-tao 秦皇島.”

   “Nebraska Gov. Jim Pillen, a Republican, issued a statement in support of the raids and signed a proclamation Friday to activate the National Guard as a precautionary measure “in anticipation of anti-ICE protests” this weekend.”

noun

1. (obsolete)A precaution.

   “Thou seest, Belford, by the above precautionaries, that I forget nothing.”