• 1. to make a deep prolonged resonant sound, as of thunder or artillery fire
• 2. to prosper or cause to prosper vigorously and rapidly
• 3. a deep prolonged resonant sound
• 4. the cry of certain animals, esp the bittern
• 5. a period of high economic growth characterized by rising wages, profits, and prices, full employment, and high levels of investment, trade, and other economic activity - Compare depression
• 6. C15: perhaps from Dutch bommen , of imitative origin

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• 1. a spar to which a sail is fastened to control its position relative to the wind
• 2. a beam or spar pivoting at the foot of the mast of a derrick, controlling the distance from the mast at which a load is lifted or lowered
• 3. a pole, usually extensible, carrying an overhead microphone and projected over a film or television set
• 4. a barrier across a waterway, usually consisting of a chain of connected floating logs, to confine free-floating logs, protect a harbour from attack, etc
• 5. the...

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