<p><strong>Adjective</strong></p><ul><li>Of, in, on, or pertaining to the chest or breast; thoracic.</li><li>Worn on the breast or chest.</li><li>Proceeding from the heart or inner consciousness.</li><li>Speech: (of a vocal quality) appearing to come from resonance in the chest; full or deep.</li><li>Of or for diseases of the lungs.</li></ul><p><strong>Noun</strong></p><ul><li>Anatomy: a pectoral part or organ, as a pectoral muscle.</li><li>Pectoral fin.</li><li>Something worn on the breast for ornament, protection, etc., as a breastplate.</li></ul>