empty nester

or emp·ty-nest·er

noun

a parent whose children have reached adulthood and left home.

Origin of empty nester

First recorded in 1960–65; empty nest + -er¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for empty-nester

empty-nester

noun

informal a married person whose children have grown up and left home

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