|1.||Norway spruce blue spruce white spruce See also black spruce any coniferous tree of the N temperate genus Picea, cultivated for timber and for ornament: family Pinaceae. They grow in a pyramidal shape and have needle-like leaves and light-coloured wood|
|2.||the wood of any of these trees|
|[C17: short for Spruce fir, from C14 Spruce Prussia, changed from Pruce, via Old French from Latin Prussia]|
|(adverb) to make (oneself, a person, or thing) smart and neat|
Make neat and trim, as in She spruced up the chairs with new cushions. This idiom originated in the late 1500s as simply spruce but had acquired up by 1676.