<p><strong>Noun</strong></p><ul><li>the science that deals with the composition and properties of substances and various elementary forms of matter.</li><li>chemical properties, reactions, phenomena, etc.: the chemistry of carbon.</li><li>the interaction of one personality with another: The chemistry between him and his boss was all wrong.</li><li>sympathetic understanding; rapport: the astonishing chemistry between the actors.</li><li>any or all of the elements that make up something: the chemistry of love.</li></ul>