Definition of "trebling" [trebling]

• Present participle of treble. (verb)

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• "Since joining the coalition government, the Liberal Democrats have faced criticism for breaking a number of pre-election pledges, namely trebling the cap on university tuition fees and increasing sales tax."
• "£7,000,000 by taxation, chiefly by a measure generally known as trebling the assessed taxes, by which the amounts already charged in respect of these taxes were augmented on a scale graduated according to income."
• "In the last twenty years, two billion men and women have joined the ranks of industrial producers, trebling the size of the world's industrial economy."