dipolePronunciation: /ˈdʌɪpəʊl/Definition of dipole noun 1 Physics a pair of equal and oppositely charged or magnetized poles separated by a distance. Chemistry a molecule in which a concentration of positive electric charge is separated from a concentration of negative charge. 2an aerial consisting of a horizontal metal rod with a connecting wire at its centre. Derivatives dipolar adjective dipole in other Oxford dictionaries Definition of dipole in the US English dictionary