The noun ἰδέα denotes the outward form, appearance, or visible shape of something—what meets the eye. Classical philosophy used it for abstract "forms" or "ideas," but in more concrete usage it simply meant physical appearance or kind. Matthew 28:3 uses it to describe the angel at the tomb: "His appearance was like lightning." The word focuses on visible aspect—what the witnesses saw. Across languages, translations render it as "appearance" (Spanish "apariencia," French "apparence"), the straightforward sense of outward look or form. The philosophical sense of ἰδέα (Platonic Forms) is not relevant in biblical usage, which focuses on phenomenal appearance.