What is the meaning of the word "sound"?

Definitions:

a large ocean inlet or deep bay noun
- the main body of the sound ran parallel to the coast
announce by means of a sound verb
- sound the alarm
appear in a certain way verb
- This sounds interesting
cause to sound verb
- sound the bell
financially secure and safe adjective
- sound investments
free from moral defect adjective
- The student had a sound character.
give off a certain sound or sounds verb
- This record sounds scratchy
having legal efficacy or force adjective
- a sound title to the property
logically valid adjective
- a sound argument
mechanical vibrations transmitted by an elastic medium noun
- falling trees make a sound in the forest even when no one is there to hear them
the particular auditory effect produced by a given cause noun
- the sound of rain on the roof
the subjective sensation of hearing something noun
- We strained to hear the faint sound of the owl's flapping wings.
the sudden occurrence of an audible event noun
- the sound awakened them
thorough adjective
- a sound thrashing