Britannica Dictionary definition of RAPID
[more rapid; most rapid]
1
:
happening in a short amount of time
:
happening quickly
-
a rapid [=quick] change in temperature
-
There's been rapid growth in the number of new businesses in the town.
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Scientists are concerned about the rapid disappearance of the island's coral reefs.
2
:
having a fast rate
-
a rapid heartbeat
-
rapid breathing
— rapidity
/rəˈpɪdəti/
noun
[noncount]