pinnacle
Cross references: 1. summit 1. pin.na.cle \'pin-i-k*l\ n [ME pinacle, fr. MF, fr. LL pinnaculum gable, fr. dim. of L pinn]a wing, battlement 1: an upright architectural member generally ending in a small spire and us ed esp. in Gothic construction to give weight to a buttress or angle pier 2: a structure or formation suggesting a pinnacle; specif : a lofty peak 3: the highest point of development or achievement : ACME 2. pinnacle \-k(*-)lin\ vt or pin.na.cling 1: to surmount with a pinnacle 2: to raise or rear on a pinnacle
Webster's English Dictionary