A trend is a line of general direction of movement, a prevaling tendency of inclination, a style or preference, a line of development, or the general movement over time of a statistically detectable change . In a few words, "trend" is a synonym to "tendency". A fad is a practice or interest followed for a time with exaggerated zeal. A craze is a product, idea, cultural movement, or model that gains popularity among a small section of the populace then quickly migrates to the mainstream. Crazes… (More on Fads)