Cau·tion n.
 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. [R.]
    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.
 Syn: -- Care; forethought; forecast; heed; prudence; watchfulness; vigilance; circumspection; anxiety; providence; counsel; advice; warning; admonition.