a booming sound or cry

to make a deep hollow sound or cry

The bitterns boomed and the frogs croaked — H Rider Haggard

to experience a rapid increase in activity or market success

Business was booming

to cause (something) to resound

‘But somewhat dangerous to navigation,’ boomed Richard — Virginia Woolf

a spar at the foot of the mainsail in a fore-and-aft rig that is attached at its fore end to the mast

a long movable arm used to manipulate a microphone

a floating barrier across a river or enclosing an area of water, e.g. to keep logs together, confine an oil spill, etc

a cable or line of spars extended across a river or the mouth of a harbour as a barrier to navigation