As a noun:
* The sound of the ocean waves was calming. (Referring to an auditory experience)
* The sound of her laughter filled the room. (Referring to a specific noise)
* The engineer checked the sound system before the concert. (Referring to a system for producing sound)
As a verb:
* The bell sounded at 3 pm. (Meaning to make a noise)
* The news sounded hopeful. (Meaning to appear or seem)
* The doctor sounded concerned about the patient's condition. (Meaning to express something verbally)
As an adjective:
* The sound advice from her mentor helped her succeed. (Meaning sensible or good)
* The decision was sound and well-considered. (Meaning valid or reliable)
* She made a sound investment in the stock market. (Meaning financially safe and sensible)
In an idiomatic expression:
* The plan sounds good on paper, but it might not work in reality. (Meaning to seem plausible but may not be)
* The speaker sounded off about the government's policies. (Meaning to express one's opinions forcefully)
These are just a few examples, and the meaning of "sound" can vary depending on the context.