low-key(redirected from Low key)
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1. Modest and restrained, often intentionally to avoid being conspicuous, loud, wild, etc. It's just going to be a little, low-key gathering with friends, no big deal. I'm trying to keep news of my promotion low-key, so as not to upset some of my co-workers.
2. Not exhibiting much energy or enthusiasm; mellow. You seem pretty low-key today. Everything OK?
mod. not obvious; not hyped. Let’s try to keep this low-key so as not to upset the family.