adv. 25B6; adverb
her hair was combed smoothly back : EVENLY, level, flat, flush.
the door closed smoothly : FLUIDLY, fluently, steadily, frictionlessly, easily; quietly.
the plan had gone smoothly : WITHOUT A HITCH, like clockwork, without difficulty, easily, effortlessly, according to plan, swimmingly, satisfactorily, very well; informal like a dream.