Study for the SAT Vocabulary 2025 Test. Master vocabulary with flashcards and questions, each with detailed explanations. Get ready for your exam!

The term "nebulous" refers to something that is vague or unclear. In this context, it describes ideas, concepts, or situations that lack definitive outlines or clarity. When something is described as nebulous, it often conveys a sense of ambiguity or indistinctness, making it difficult to grasp or understand fully.

The other choices, while suggesting clarity or precision—definite, clear, and specific—are all in direct contrast to what nebulous represents. Therefore, selecting the term that describes something as vague aligns perfectly with the meaning of "nebulous."