Dictionary  pin•na•clePronunciation: (pin'u-kul), [key] —n., v., -cled, -cling. —n. 1. a lofty peak. 2. the highest or culminating point, as of success, power, fame, etc.: the pinnacle of one's career. 3. any pointed, towering part or formation, as of rock. 4. Archit.a relatively small, upright structure, commonly terminating in a gable, a pyramid, or a cone, rising above the roof or coping of a building, or capping a tower, buttress, or other projecting architectural member. See illus. under imbrication. —v.t. 1. to place on or as on a pinnacle. 2. to form a pinnacle on; crown. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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