Pronunciation: (pu-sif'ik),[key] —adj. 1. tending to make or preserve peace; conciliatory: pacific overtures. 2. not warlike; peaceable; mild: a pacific disposition. 3. at peace; peaceful: a pacific era in history. 4. calm; tranquil: The Wabash is a pacific river. 5. (cap.) of or pertaining to the Pacific Ocean.
6. (cap.) of or pertaining to the region bordering on the Pacific Ocean: the Pacific states.
—n.(cap.) 1. See Pacific Ocean. 2. a steam locomotive having a four-wheeled front truck, six driving wheels, and a two-wheeled rear truck. See table under Whyte classification