By definition, an adjective is <em>"a word or phrase naming an attribute, added to or grammatically related to a noun to modify or describe it."</em>
It means that when we are describing something, we use adjectives to attribute qualities and characteristics that help others visualize what is being described. Words like: "frightening", "scary", and "ominous", are examples of it.
The tablecloths were all black and drooped gloomily over the edges of the tables. The streamers looked more like cobwebs than party decorations. It looked more like a funeral than a birthday party.