noun

• (in the plural) Any game using playing cards; a card game.
  "He played cards with his friends."
• (uncountable) Paper that is thicker and more durable than normal writing or printing paper, but thinner and more flexible than paperboard, used for postcards, playing cards, etc.; card stock.
  "Do you have any card? I want to make a poster."
• (obsolete) A map or chart.
  "As pilot well expert in perilous waue, / Vpon his card and compas firmes his eye […]."
• (informal) An amusing or entertaining person, often slightly eccentric.
  ""He's a cheery old card," muttered Harry to Jack / As they slogged up to Arras with rifle and pack. / . . . / But he did for them both by his plan of attack."

verb

• (transitive, US) To check IDs, especially against a minimum age requirement.
  "They have to card anybody who looks 21 or younger."
• (dated) To play cards.
  "For Corinius, who gave not a fig for music or dirges, but liked well of carding and dicing, had brought forth his dice box to play with the son of Corund."
• (transitive, golf) To make (a stated score), as recorded on a scoring card.
  "McIlroy carded a stellar nine-under-par 61 in the final round."

noun

• (uncountable, dated) Material with embedded short wire bristles.
• (dated, textiles) A comb- or brush-like device or tool to raise the nap on a fabric.
• (textiles) A hand-held tool formed similarly to a hairbrush but with bristles of wire or other rigid material. It is used principally with raw cotton, wool, hair, or other natural fibers to prepare these materials for spinning into yarn or thread on a spinning wheel, with a whorl or other hand-held spindle. The card serves to untangle, clean, remove debris from, and lay the fibers straight.
• (dated, textiles) A machine for disentangling the fibres of wool prior to spinning.

verb

• (textiles) To use a carding device to disentangle the fibres of wool prior to spinning.
  ""Isn't that true, Bertha? " asked the smith. "Yes, every word of it, my lad," said Mother Bertha, who was sitting near the hearth carding."
• (transitive) To comb with a card; to cleanse or disentangle by carding.
  "to card a horse"
• (obsolete, transitive, figuratively) To clean or clear, as if by using a card.
  "It is necessary that this book carded and purged of certain base things."
• (obsolete, transitive) To mix or mingle, as with an inferior or weaker article.
  "that card your beer, if you see your guests begin to be drunk, half small and half strong"