grandson

[ gran-suhn, grand- ]
/ ˈgrænˌsʌn, ˈgrænd- /

noun

a son of one's son or daughter.

Origin of grandson

First recorded in 1580–90; grand- + son
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for grandson

grandson

/ (ˈɡrænsʌn, ˈɡrænd-) /

noun

a son of one's son or daughter
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