"Gradient lip" refers to a makeup technique where the color on the lips gradually transitions from a darker shade on the inner parts to a lighter shade on the outer edges, creating a soft and blended effect. Full definition
Place the darker color on the inner lips and the lighter color on outer edges for instant gradient lips. (stylevanity.com)
I prefer to only use it as gradient lips using a small amount of the product. (berriesinthesnow.com)
Place the darker color on the inner lips and a lighter color on outer edges for instant gradient lips or vice versa based on what your mood is. (thevelvetlife.com)