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To make someone, something, or oneself more tidy, refined, elegant, or stylish. A noun or pronoun can be used between "spruce" and "up." I think it's time to spruce the house up a bit—it feels a little outdated and disheveled. You don't look so good! You'd better go spruce yourself up in the bathroom before you go up to give your speech. He's spent the whole summer sprucing up his grandfather's old Camaro.
spruce someone or something up
1. Lit. to tidy up and groom someone or something. Laura's mother took a few minutes to spruce her daughter up for the party. She spruced up her room each day.
2. Fig. to refurbish or renew someone or something. Do you think we should spruce this room up a little? Yes, let's spruce up this room with new furniture and drapes.
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.
To make someone or something neat, elegant, and stylish in appearance: The new curtains will certainly spruce up this drab room. She spruced herself up and went out to dinner.