a spruce, Picea pungens, of western North America, having bluish-green leaves, grown as an ornamental: the state tree of Colorado and Utah.
Origin of blue spruce
An Americanism dating back to 1880–85
Also called Colorado blue spruce, Colorado spruce.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for blue spruce
a spruce tree, Picea pungens glauca, native to the Rocky Mountains of North America, having blue-green needle-like leavesAlso called: balsam spruce
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