To betray or go back on; to deceive someone after having gained their trust and led them to believe that they were being aided.
If you double-cross us, we'll track you down and kill you.
To cross twice in hybridization, as (A × B) × (C × D); for example, in commercial hybrid seed corn, A through D are classically inbreds, and their grandoffspring is the seed for sale.
An instance of betrayal of one who had been led to believe that the betrayer was assisting them.
The hybrid product of double-crossing.
First recorded in 1834 from thieves' slang cross (or on the cross) to refer to something dishonest, a play on straight/square: a crook going back on his partners would therefore be crossing the crosse...
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