cautionn.[F. caution a security, L. cautio, fr. cavere (For scavere) to be on one's guard, to take care (orig.) to be on the watch, see; akin to E. show.]1. A careful attention to the probable effects of an act, in order that failure or harm may be avoided; prudence in regard to danger; provident care; wariness.()2. Security; guaranty; bail.()The Parliament would yet give his majesty sufficient caution that the war should be prosecuted. (Clarendon.)3. Precept or warning against evil of any kind; exhortation to wariness; advice; injunction.()In way of caution I must tell you. (Shak.)4. (Civil & Scots Law) A pledge, bond, or other security for the performance of an obligation either in or out of judicial proceedings; the promise or contract of one not for himself but another; security.()Caution money, money deposited by way of security or guaranty, as by a student at an English university.()()v. t. To give notice of danger to; to warn; to exhort [one] to take heed.()You cautioned me against their charms. (Swift.)