The dog's bark was loud.

Meaning: This sentence describes the sound made by a dog. It means the dog made a loud noise, which could be because it's excited, scared, or wants attention.

Choice of Words: Dog's shows that the bark belongs to the dog. Bark is the sound that dogs make when they want to communicate. Was is a verb that describes something that happened in the past. Loud means making a lot of noise. When you put them together, "The dog's bark was loud" means the dog made a loud noise.