Adjectives are words that describe or provide information about nouns, such as their size, shape, age, color, origin, or material. Adjectives usually precede the nouns they modify and follow a general order of number, quality, size, shape, age, color, origin, and material. When two or more adjectives modify a noun, they are usually separated by commas, except for adjectives of color which are usually separated by "and." Adjectives can also follow nouns for emphasis or in certain phrases.