charm

1. (often in the plural) The ability to persuade, delight or arouse admiration.Examples: "He had great personal charm."; "She tried to win him over with her charms."; "[…]the charm of Beauties powerful glance."Synonyms: appeal, attraction, charismaAntonyms: boredom, drynesscountablein-pluraloftenuncountable

2. (particle physics) A quantum number of hadrons determined by the number of charm quarks and antiquarks.Examples: "In trying to understand the long life of the psi particle, physicists postulated the notion of “charm.” Charm, they say, prevents the “easy” decay of particles and thus prolongs their lifetimes. U particles, Dr. Pert said, may carry the property of charm."; "Mesons which combine the charmed quark with the up or down antiquarks are denoted the D mesons. These mesons carry explicit charm (i.e. have a non-zero charm quantum number), just as the K mesons carry strangeness."countableparticleuncountable

3. (finance) A second-order measure of derivative price sensitivity, expressed as the instantaneous rate of change of delta with respect to time.Synonyms: delta decay, DdeltaDtimecountableuncountable

4. (graphical user interface, Microsoft Windows) An icon providing quick access to a command or setting.Examples: "Undoubtedly one of the most important pieces to navigating Windows 8, charms are actually not visible until a command to show them is given."countableuncountable