dis·per·sion (d?-spûr?zh?n, -sh?n)n.1. a. The act or process of dispersing.b. The state of being dispersed.2. Dispersion The Diaspora of the Jews.3. Statistics The degree of scatter of data, usually about an average value, such as the median.4. Physics a. Separation of a complex wave into its component parts according to a given characteristic, such as frequency or wavelength.b. Separation of visible light into colors by refraction or diffraction.5. Chemistry See disperse system.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.dispersion (d??sp????n) n1. another word for dispersal2. (General Physics) physics a. the separation of electromagnetic radiation into constituents of different wavelengthsb. a measure of the ability of a substance to separate by refraction, expressed by the first differential of the refractive index with respect to wavelength at a given value of wavelength. Symbol: D 3. (Statistics) statistics the degree to which values of a frequency distribution are scattered around some central point, usually the arithmetic mean or median4. (Chemistry) chem a system containing particles dispersed in a solid, liquid, or gas5. (Military) military the pattern of fire from a weapon system6. (Astronomy) a. the range of speeds of such objects as the stars in a galaxyb. the frequency-dependent retardation of radio waves as they pass through the interstellar mediumc. the deviation of a rocket from its prescribed path7. (Biology) ecology the distribution pattern of an animal or a plant populationDispersion (d??sp????n) n1. (Historical Terms) the Dispersion another name for the Diaspora2. (Peoples) the Dispersion another name for the DiasporaCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014dis?per?sion (d??sp?r ??n, -??n) n. 1. Also, dispersal. an act or instance of dispersing or a state of being dispersed. 2. a. the variation of the index of refraction of a transparent substance, as glass, with the wavelength of light. b. the separation of white or compound light into its respective colors, as in the formation of a spectrum by a prism. 3. the scattering of values of a statistical variable around the mean or median of a distribution. 4. Also called disperse? sys`tem. a system of dispersed particles suspended in a solid, liquid, or gas. 5. (cap.) Diaspora (def. 1). [1350?1400; Middle English (