An adjective is a word that describes or modifies a noun, providing more information about it. For example, in the phrase "the blue sky," the adjective "blue" tells us what kind of sky it is. Adjectives can describe qualities, quantities, or states, helping to create a clearer picture in the reader's mind. Adjectives can be used in various forms, such as comparative and superlative. For instance, "tall" can become "taller" when comparing two objects, and "tallest" when comparing three or more. This flexibility allows adjectives to enhance language and improve communication by adding detail and nuance.