Sound

noun
  1. Vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear. noun
    The sound of the waves crashing against the rocks was soothing.
    She was startled by the sudden sound of a car horn.
  2. A particular auditory impression; tone. noun
    The sound of the violin was rich and full.
    He recognized the sound of her voice immediately.
  3. To emit or cause to emit sound. verb
    The alarm sounded at exactly 7 AM.
    She sounded the horn to alert the other drivers.
  4. To make or give a certain impression when heard or read. verb
    His explanation sounded plausible.
    The plan sounds good to me.
  5. In good condition; free from damage, injury, decay, etc. adjective
    The bridge is structurally sound.
    She gave sound advice on the matter.
  6. Financially secure and reliable. adjective
    The company is on sound financial footing.
    He made a sound investment in real estate.
  7. Deep and undisturbed (used in reference to sleep). adjective
    He had a sound sleep after the long journey.
    She was in a sound slumber when the phone rang.