/ Dictionary / Index K K meson: Meaning and Definition of Find definitions for: K meson Pronunciation: (kā'mē'zon, -son, -mez'on, -mes'on). [key] — Physics. Physics. kaon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. kMc km/sec Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language