#1 drooping s. [flagging] weak from exhaustion. wn
#2 drooping s. [droopy, sagging] hanging down (as from exhaustion or weakness). wn
#3 drooping s. [cernuous, nodding, pendulous, weeping] having branches or flower heads that bend downward; "nodding daffodils"; "the pendulous branches of a weeping willow"; "lilacs with drooping panicles of fragrant flowers". wn
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