What is commonly included in a definition context clue?

Including signal words such as "that is" is a hallmark of definition context clues. These signal words indicate that what follows will clarify or define a particular term. For instance, when a sentence states, "The arboreal animal, that is, a creature that lives in trees, exhibits fascinating behaviors," the phrase "that is" introduces a definition that elaborates on "arboreal."

This construction not only aids comprehension by explicitly stating the meaning but also allows readers to grasp unfamiliar terms within the surrounding context. The presence of these signal words is a strong indicator that a definition or explanation is being provided, making it easier for the reader to connect the new information to their existing knowledge.