形象 (xíngxiàng) as a noun means 'image, public image' — the impression or appearance of a person, brand, or thing. As an adjective it means 'vivid, graphic' (describing language or description). Contrast with 外形 (wàixíng), which is only the physical shape/outline, and 图像 (túxiàng), which is a concrete picture or graphic (not an abstract impression). For 'vivid', 形象 is about clear, lifelike description; 生动 (shēngdòng) adds a sense of liveliness and energy.