|Origin:||'tree, long piece of wood'|
a quick increase of business activity [≠ slump]: ➔ boom town
increase in business[singular]BPE
The boom has created job opportunities.
a sudden boom in the housing market
consumer/investment/property etc boom
the post-war property boom
In boom times, airlines do well.
the economic boom of the 1950s
The economy went from boom to bust (=from increasing to decreasing) very quickly.
an increase in how popular or successful something is, or in how often it happens:
when something is popular[singular]
the disco boom of the 1970s
boom in➔ baby boom
the boom in youth soccer in the U.S.
a deep loud sound that you can hear for several seconds after it begins, especially the sound of an explosion or a large gun ➔ sonic boom
a long pole on a boat that is attached to the bottom of a sail, and that you move to change the position of the sail
a long pole used as part of a piece of equipment that loads and unloads things
a long pole that has a camera or microphone on the end
something that is stretched across a river or a bay to prevent things floating down or across it