What is the meaning of sounder?

noun

• A device for making soundings.

adjective

• Financially secure and safe.
  • usage: "sound investments"; "a sound economy"
  • synonyms: sound
• Exercising or showing good judgment.
  • usage: "healthy scepticism"; "a healthy fear of rattlesnakes"; "the healthy attitude of French laws"; "healthy relations between labor and management"; "an intelligent solution"; "a sound approach to the problem"; "sound advice"; "no sound explanation for his decision"
  • synonyms: healthy, intelligent, levelheaded, level-headed, sound
• In good condition; free from defect or damage or decay.
  • usage: "a sound timber"; "the wall is sound"; "a sound foundation"
  • synonyms: sound
• In excellent physical condition.
  • usage: "good teeth"; "I still have one good leg"; "a sound mind in a sound body"
  • synonyms: good, sound
• Logically valid.
  • usage: "a sound argument"
  • synonyms: reasoned, sound, well-grounded
• Having legal efficacy or force.
  • usage: "a sound title to the property"
  • synonyms: legal, sound, effectual
• Free from moral defect.
  • usage: "a man of sound character"
  • synonyms: sound
• Of sleep. ( deep and complete)
  • usage: "a heavy sleep"; "fell into a profound sleep"; "a sound sleeper"; "deep wakeless sleep"
  • synonyms: heavy, profound, sound, wakeless
• Thorough.
  • usage: "a sound thrashing"
  • synonyms: sound