African blackwood (Dalbergia melanoxylon), of Africa / Australian blackwood (Acacia melanoxylon), of eastern Australia / Bombay blackwood (Dalbergia latifolia), of India

A number of places in the United Kingdom: / A number of places in the United States: / A suburb of Adelaide, in the City of Mitcham, South Australia.

(bridge) A bidding convention in contract bridge, used to explore the partnership's possession of aces, kings and in some variants the queen of trumps, to judge more precisely whether slam is likely to be a good contract.

plural of blackwood

A tree, Acacia melanoxylon, native to eastern Australia and Tasmania, or (especially) the dark wood of this tree.