1. yellow card - Noun
2. yellow card - Verb
(sports) a yellow-coloured card, shown to a player (especially in association football) as a caution that he or she has committed a flagrant foul; a further such foul would result in a red card.
(medicine) one of various yellow-colored cards used to verify the healthiness, vaccination status or other medical info of travelers.
(medicine, UK) a form to record safety concerns and adverse reactions to medicinal drugs.
(often attributive) A card sent out by a travelling dance or theatre company to request temporary personnel from a local labor union.
(historical) A yellow ticket.
(historical) a card given to British Army personnel during The Troubles .
yellow-card (third-person singular simple present yellow-cards, present participle yellow-carding, simple past and past participle yellow-carded)
(sports) To show someone a yellow card
yellow-card