Definition of "bulking" [bulking]

• Present participle of bulk. (verb)

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• "Fiat SpA Chief Executive Sergio Marchionne said this week that Fiat is open to the idea of bulking up with another volume car maker to create economies of scale."
• "Both were struck by the idea of bulking up the brain, what brain scientists refer to as "cognitive reserve.""
• "Most scouts seem to think he's best suited for end in a 4-3 defense, but those for 3-4 teams toy with the idea of bulking him up to play end or using him at linebacker."