summit (n.) Look up summit at Dictionary.com
late 15c., from Middle French somete, from Old French sommette, diminutive of som, sum "highest part, top of a hill," from Latin summum, noun use of neuter of summus "highest," related to super "over" (see super-). The meaning "meeting of heads of state" (1950) is from Winston Churchill's metaphor of "a parley at the summit."