pro-choice (pr?-chois?)adj. Favoring legalized abortion as an option for an unwanted pregnancy.pro-choic?er n.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.pro-choice adj (Sociology) (of an organization, pressure group, etc) supporting the right of a woman to have an abortion. Compare pro-life Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014pro-choice or pro?choice (pro??t???s) adj. supporting or advocating the right to legalized abortion. Compare pro-life. [1970?75] pro-choic?er, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.