Soccer. a yellow card shown by the referee to a player being cautioned for a violation.
Compare red card.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a card of a yellow colour displayed by a referee to indicate that a player has been officially cautioned for some offence
(tr) to caution (a player) officially for some offence
serving as a warning; intended to warna yellow card system is in place
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012