the act of diffusing or state of being diffused: During the gradual, unorchestrated diffusion of ideas from science into the surrounding culture, crucial information can sometimes be lost.
excessive wordiness of speech or writing; long-windedness.
Movies. a soft-focus effect resulting from placing a gelatin or silk plate in front of a studio light or a camera lens, or through the use of diffusion filters.
Meteorology. the spreading of atmospheric constituents or properties by turbulent motion as well as molecular motion of the air.
Anthropology, Sociology.Also called cul·tur·al dif·fu·sion [kuhl-cher-uhl di-fyoo-zhuhn] /ˈkʌl tʃər əl dɪˈfyu ʒən/ . the transmission of elements or features of one culture to another.
- in·ter·dif·fu·sion, noun
- non·dif·fu·sion, noun
- o·ver·dif·fu·sion, noun
- re·dif·fu·sion, noun
- self-dif·fu·sion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
British Dictionary definitions for diffusion
the act or process of diffusing or being diffused; dispersion
the random thermal motion of atoms, molecules, clusters of atoms, etc, in gases, liquids, and some solids
the transfer of atoms or molecules by their random motion from one part of a medium to another
physics the transmission or reflection of electromagnetic radiation, esp light, in which the radiation is scattered in many directions and not directly reflected or refracted; scattering
Also called: diffusivity physics the degree to which the directions of propagation of reverberant sound waves differ from point to point in an enclosure
anthropol the transmission of social institutions, skills, and myths from one culture to another
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for diffusion
The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. Compare osmosis.
The reflection or refraction of radiation such as light or sound by an irregular surface, tending to scatter it in many directions.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for diffusion
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.