1. Acoustical Society of America.
  2. American Standards Association: former name of the American National Standards Institute.
  3. the numerical exposure index of a photographic film under the system adopted by the American Standards Association, used to indicate the light sensitivity of the film's emulsion. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for asa

Contemporary Examples of asa

Historical Examples of asa

British Dictionary definitions for asa


abbreviation for
  1. (in Britain) Amateur Swimming Association
  2. (in Britain) Advertising Standards Authority
  3. (in the US) American Standards Association
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