one-time (w?n?t?m?)adj.1. or one·time (w?n?t?m?)a. Occurring or undertaken only once: a one-time winner in 1995.b. Having been in the past; former: asked his one-time classmates for help.2. Sports Relating to or being a shot made from a pass that is not stopped prior to shooting.tr.v. one·timed, one·tim·ing, one·times Sports To shoot (a ball or puck) directly from a pass.one?-tim?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.one-time adj (prenominal) at some time in the past; former adv informal Caribbean at once Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014one?-time` or one?time`, adj. 1. having been as specified at one time; former. 2. occurring, done, etc., only once. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.