stepping stone

noun

one of a series of stones acting as footrests for crossing streams, marshes, etc
a circumstance that assists progress towards some goal

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


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