A Caution

1. Precept or warning against evil or danger of any kind; exhortation to wariness; advice; injunction; prudence in regard to danger; provident care
2. A careful attention to the probable effects of an act, in order that failure or harm may be avoided
3. Security; guaranty; bail.
4. (dated) One who draws attention or causes astonishment by their behaviour.
5. (law) A formal warning given as an alternative to prosecution in minor cases.
6. (soccer) A yellow card.