1 period of sudden increase
ADJ. great | post-war | consumer, credit, economic, investment, spending | building, housing, property | oil | baby
VERB + BOOM cause, create, fuel, lead to The boom was fuelled by accelerated demand for consumer products.
BOOM + NOUN period, time, year | town
PREP. during/in a/the ~ He was born during the post-war baby boom. | ~ in a boom in house prices
PHRASES boom and bust/slump the ordinary business cycle of boom and bust
2 deep hollow sound
ADJ. big | deep | distant | sonic (= the explosive sound made when an aircraft flies faster than the speed of sound) We heard the sonic boom of a jet overhead.
VERB + BOOM hear
BOOM + VERB echo The deep boom of a foghorn echoed across the bay.
PREP. with a ~