English Reference
adjective · noun

rapid

adj. · n.
US /ˈɹæpəd/ UK /ɹˈæpɪd/ rapid

  1. 01 B2 Upper Intermediate

    adj.happening very quickly or moving at high speed.

    adj.characterised by great speed or occurring within a short period of time.

    Simple

    The city has seen rapid growth in the number of new businesses this year.

    In context

    The patient showed a rapid recovery following the surgery, surprising the medical team with her regained strength within forty-eight hours.

    Usage

    Often used in professional or academic contexts to describe change, growth, or progress.

  2. 02 B2 Upper Intermediate

    n.a part of a river where the water moves very fast and becomes rough as it flows over rocks.

    n.a section of a river where the gradient increases enough to cause turbulence and increased velocity, typically over a rocky bed.

    Simple

    The kayakers had to be careful as they approached the dangerous rapids.

    In context

    Navigating the Class IV rapids required immense technical skill and precise coordination between the members of the rafting crew.

    Usage

    Almost always used in the plural form when referring to the section of the river.

    whitewatercurrent

Usage rapid adoption · rapid response · rapid spread

The rapid rise in petrol prices caused by the Iran war has also caused interest in electric cars to spike around the world as a consumer spending measure.

BBC News· 14 Aug 2026

Pagers were originally used because they allowed for rapid information sharing.

BBC News· 14 Aug 2026

Borrowed from Middle French rapide and its etymon Latin rapidus.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin rapidus
Level B2 · Upper Intermediate
Frequency Common
Updated