What is the meaning of bunk?

noun

• A long trough for feeding cattle.
  • synonyms: feed bunk
• A bed on a ship or train; usually in tiers.
  • synonyms: berth, built in bed
• A rough bed (as at a campsite. )
• Unacceptable behavior (especially ludicrously false statements.
  • synonyms: bunkum, buncombe, guff, rot, hogwash
• A message that seems to convey no meaning.
  • synonyms: nonsense, nonsensicality, meaninglessness, hokum
• Beds built one above the other.
  • synonyms: bunk bed

verb

• Avoid paying.
  • usage: "beat the subway fare"
  • synonyms: beat
• Provide with a bunk.
  • usage: "We bunked the children upstairs"
• Flee; take to one's heels; cut and run.
  • usage: "If you see this man, run"; "The burglars escaped before the police showed up"
  • synonyms: scat, run, scarper, turn tail, lam, run away, hightail it, head for the hills, take to the woods, escape, fly the coop, break away