Smooth/smuːð/ Definition 1 of 6Pro Tip 1/3Physical smoothness Relates to surfaces that feel flat or even when touched. The table's smooth finish made it pleasant to touch. Pro Tip 2/3Visual perception Describes surfaces that look uniform without visible roughness. The artist's brushstrokes gave the painting a smooth appearance. Pro Tip 3/3Metaphorical use Can be used metaphorically to describe situations without problems. After sorting out the issues, the project ran smooth.