Artificial intelligent assistant

bowling-green

ˈbowling-green
  A smooth level lawn or green for playing bowls upon. (Hence a common simile ‘as level (or smooth) as a bowling-green’.)

1646 Evelyn Mem. (1857) I. 227 The whole country flat and even as a bowling-green. a 1695 Wood Life (1848) 267 Trained privately in New Coll. bouling-green. 1800 M. Edgeworth Lottery ii, Going to a bowling-green tea-party this evening. 1825 Waterton Wand. S. Amer. i. i. 120 An immense plain..as level as a bowling-green.

Oxford English Dictionary

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