/ ˈærɪd; NAmE / adjective
1.
( of land or a climate ) having little or no rain; very dry :
arid and semi-arid deserts
2.
( formal ) with nothing new or interesting in it :
an arid discussion
► arid·ity / əˈrɪdəti; NAmE / noun [ U ]
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WORD ORIGIN
mid 17th cent.: from French aride or Latin aridus , from arere be dry or parched.