From The Collaborative International Dictionary of English v.0.48:
Peaceful \Peace"ful\, a. 1. Possessing or enjoying peace; not disturbed by war, tumult, agitation, anxiety, or commotion; quiet; tranquil; as, a peaceful time; a peaceful country; a peaceful end. [1913 Webster]
2. Not disposed or tending to war, tumult or agitation; pacific; mild; calm; peaceable; as, peaceful words. [1913 Webster]
Syn: See Peaceable. [1913 Webster] --Peace"ful*ly, adv.. -- Peace"ful*ness, n. [1913 Webster]