What does d.o.n.t. mean inbridge?

In the context of bridge, "D.O.N.T." stands for "Disturbing Opponents' No-Trump." It is a bidding system used to preemptively disrupt the opponents' ability to bid effectively in no-trump contracts. Essentially, it involves using certain bids to indicate specific hand types and to interfere with the opponents' communication. This strategy aims to create uncertainty and make it harder for them to find their optimal contract.