noun. ['ˈklʌmpɪŋ'] the sound of a horse's hoofs hitting on a hard surface.
1. Verb, gerund or present participle Avoid clumping the paint; more thin coats of primer are better than one thick, clumpy coat. 2. Noun, singular or mass Paint the acrylic paint over the primer with a brush; keep the paint smooth and avoid clumping.
