charm

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The power or quality of pleasing or delighting; appeal.
• noun A quality that pleases or attracts; a delightful characteristic.
• noun A small ornament, such as one worn on a bracelet.
• noun An item worn for its supposed magical benefit, as in warding off evil; an amulet.
• noun An action or formula thought to have magical power.
• noun A quantum property of subatomic particles that is conserved in electromagnetic and strong interactions but may not be conserved in weak interactions that cause the decay of particles containing charm quarks.
• noun The quantum number that represents the charm property, equal to the difference between the number of charm quarks and the number of charm antiquarks.
• intransitive verb To delight or fascinate.
• intransitive verb To induce by means of strong personal attractiveness.
• intransitive verb To cast or seem to cast a spell on; bewitch.
• intransitive verb To be alluring or pleasing.
• intransitive verb To function as an amulet or charm.
• intransitive verb To use magic spells.

from The Century Dictionary.

• noun A melody; a song.
• noun Anything believed to possess some occult or supernatural power, such as an amulet, a spell, or some mystic observance or act.
• noun Hence A trinket, such as a locket, seal, etc., worn especially on a watch-guard.
• noun An irresistible power to please and attract, or something which possesses this power; fascination; allurement; attraction.
• noun Synonyms Spell, enchantment, witchery, magic.
• To subdue, control, or bind, as if by incantation or magical influence; soothe, allay, or appease.
• To fortify or make invulnerable with charms.
• To give exquisite pleasure to; fascinate; enchant.
• To affect by or as if by magic or supernatural influences: as, to charm a serpent out of his hole or into a stupor; to charm away one's grief; to charm the wind into silence.
• To play upon; produce musical sounds from.
• = Syn. 1, 2, and Fascinate, etc. (see enchant), delight, transport, bewitch, ravish, enrapture, captivate.
• To produce the effect of a charm; work with magic power; act as a charm or spell.
• To give delight; be highly pleasing: as, a melody that could charm more than any other.
• To give forth musical sounds.
• noun The confused low murmuring of a flock of birds; chirm.
• noun In hawking, a company: said of goldfinches.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete A melody; a song.
• noun A word or combination of words sung or spoken in the practice of magic; a magical combination of words, characters, etc.; an incantation.
• noun That which exerts an irresistible power to please and attract; that which fascinates; any alluring quality.
• noun Anything worn for its supposed efficacy to the wearer in averting ill or securing good fortune.
• noun Any small decorative object worn on the person, as a seal, a key, a silver whistle, or the like. Bunches of charms are often worn at the watch chain.
• noun (Physics) a property of certain quarks which may take the value of +1, -1 or 0.
• transitive verb Obs. & R. To make music upon; to tune.
• transitive verb To subdue, control, or summon by incantation or supernatural influence; to affect by magic.
• transitive verb To subdue or overcome by some secret power, or by that which gives pleasure; to allay; to soothe.
• transitive verb To attract irresistibly; to delight exceedingly; to enchant; to fascinate.
• transitive verb To protect with, or make invulnerable by, spells, charms, or supernatural influences.
• intransitive verb To use magic arts or occult power; to make use of charms.
• intransitive verb To act as, or produce the effect of, a charm; to please greatly; to be fascinating.
• intransitive verb obsolete To make a musical sound.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An object, act or words believed to have magic power.
• noun The ability to persuade, delight or arouse admiration; often constructed in the plural.
• noun physics A quantum number of hadrons determined by the quantity of charm quarks & antiquarks.
• noun A small trinket on a bracelet or chain, etc.