universal grinder UK /ˌjuːnɪˌvɜːsl̩ ˈɡɹaɪndə/US /ˌjunəˌvɜɹs(ə)l ˈɡɹaɪndəɹ/ noun1 •A notional mechanism whereby countable nouns are made uncountable.Substances survive [Francis Jeffry] Pelletier's universal-grinder test (are homogeneous) where objects do not, and substance kind supports different inferences from object kind. — 2009 formsuniversal grinders