adj

• (of a thing) Having a low temperature.
  "A cold wind whistled through the trees."
• (of the weather) Causing the air to be cold.
  "The forecast is that it will be very cold today."
• (of a person or animal) Feeling the sensation of coldness, especially to the point of discomfort.
  "She was so cold she was shivering."
• (usually with "have" or "know" transitively) Perfectly, exactly, completely; by heart; down pat.
  "Practice your music scales until you know them cold."

noun

• (uncountable) A condition of low temperature.
  "Come in, out of the cold."
• (with 'the', figurative) A harsh place; a place of abandonment.
  "The former politician was left out in the cold after his friends deserted him."
• (countable, pathology) A common, usually harmless, usually viral illness, usually with congestion of the nasal passages and sometimes fever.
  "I caught a miserable cold and had to stay home for a week"
• (uncountable, slang) Rheum; sleepy dust.
  "Who the fuck is this, pagin' me at 5:46 in the morning? / crack of dawn and now I'm yawnin' / wipe the cold out my eye, see who's this pagin' me and why"

adv

• (slang, informal, dated) In a cold, frank, or realistically honest manner.
  "Now Little Bo Peep cold lost her sheep / And Rip van Winkle fell the hell asleep"

noun

• (computing) Acronym of computer output to laser disc.