noun

The term "bark" refers to the protective outer layer of a tree, consisting of dead cells and serving as a barrier against injury, disease, and water loss. In animals, it refers to the harsh, explosive vocalization produced by certain species, typically dogs, to express emotions such as alarm, aggression, or excitement.

Example

1. The rough bark of the oak tree provided a natural scratching post for the neighborhood cats.
2. The sound of the dog's loud bark echoed through the park, alerting everyone of its presence.
3. The park ranger noticed that the bark on the pine tree was peeling, indicating it might be infested with insects.