<p><strong>Noun:</strong></p><ul><li>The act of reducing or the state of being reduced.</li><li>The amount by which something is reduced or diminished.</li><li>A form produced by reducing a copy on a smaller scale.</li><li>Cell Biology. Meiosis, especially the first meiotic cell division in which the chromosome number is reduced by half.</li><li>Chemistry. The process or result of reducing.</li><li>Movies. The process of making a print of a narrower gauge from a print of a wider gauge: the reduction of 35-millimeter films to 16-millimeter films for the school market.</li><li>A village or settlement of Indians in South America established and governed by Spanish Jesuit missionaries.</li></ul>