What is the meaning of snuff?

noun

• The charred portion of a candlewick.
• A pinch of smokeless tobacco inhaled at a single time.
• Finely powdered tobacco for sniffing up the nose.
• Sensing an odor by inhaling through the nose.
  • synonyms: sniff

verb

• Sniff or smell inquiringly.
  • synonyms: snuffle
• Inhale audibly through the nose.
  • usage: "snuff coke"

adjective

• Snuff colored; of a greyish to yellowish brown.
  • synonyms: snuff-brown, mummy-brown, chukker-brown