luck·y (l?k??)adj. luck·i·er, luck·i·est 1. Having or attended by good luck. See Synonyms at fortunate.2. Believed to bring good luck: hoped to draw a lucky number.luck?i·ness 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.lucky (?l?k?) adj, luckier or luckiest1. having or bringing good fortune2. happening by chance, esp as desired ?luckily adv ?luckiness nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014luck?y (?l?k i) adj. luck?i?er, luck?i?est. 1. having or marked by good luck; fortunate: That was my lucky day. 2. happening fortunately: a lucky accident. 3. believed to bring or foretell good luck: a lucky penny. [1495?1505] luck?i?ness, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.lucky – happy1. ‘lucky’You say that someone is lucky when something nice happens to them, or when they always seem to have good luck.Don’t use ‘lucky’ to say that someone has feelings of pleasure and contentment. The word you use is happy.