A descriptive adjective is a word that describes a noun by providing more information about its qualities, characteristics, or features. For example, in the phrase “the blue sky,” the adjective “blue” describes the color of the sky, helping to create a clearer image in the reader's mind. Descriptive adjectives can indicate various attributes, such as size, shape, color, and emotion. In the sentence “the happy dog wagged its tail,” the adjective “happy” describes the dog's emotional state, giving the reader a better understanding of the scene.