Having a surface free from irregularities, roughness, or projections; even. See Synonyms at level. Having a fine texture: a smooth fabric. Free from hair, whiskers, or stubble: felt his smooth cheek after the close shave. Having a short dense flat coat. Used of dogs. Having an even consistency: a smooth pudding. Having an even or gentle motion or movement: a smooth ride. Having no obstructions or difficulties: a smooth operation. Serene: a smooth temperament. Bland: a smooth wine. Ingratiatingly polite and agreeable. Having no grossness or coarseness in dress or manner. To make (something) even, level, or unwrinkled. To rid of obstructions, hindrances, or difficulties. To soothe or tranquilize; make calm. To make less harsh or crude; refine. To become smooth. The act of smoothing. A smooth surface or part.