Silent; not speaking. Thackeray. The citizens are mum, and speak not a word. Shak.
Be silent! Hush! Mum, then, and no more. Shak.
Silence. [R.] Hudibras.
A sort of strong beer, originally made in Brunswick, Germany. Addison. The clamorous crowd is hushed with mugs of mum. Pope.
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