What is the meaning of subvert?

verb

• Cause the downfall of; of rulers.
  • usage: "The Czar was overthrown"; "subvert the ruling class"
  • synonyms: overthrow, overturn, bring down
• Corrupt morally or by intemperance or sensuality.
  • usage: "debauch the young people with wine and women"; "Socrates was accused of corrupting young men"; "Do school counselors subvert young children"; "corrupt the morals"
  • synonyms: corrupt, pervert, demoralize, demoralise, debauch, debase, profane, vitiate, deprave, misdirect
• Destroy property or hinder normal operations.
  • usage: "The Resistance sabotaged railroad operations during the war"
  • synonyms: sabotage, undermine, countermine, counteract, weaken
• Destroy completely.
  • usage: "we must not let our civil liberties be subverted by the current crisis"