I. ˈra-pəd adjective
Etymology: Latin rapidus seizing, sweeping, rapid, from rapere to seize, sweep away; akin to Lithuanian ap rėpti to embrace
Date: 1634
: marked by a fast rate of motion, activity, succession, or occurrence
Synonyms: see fast
• rap·id·ly adverb
• rap·id·ness noun
II. noun
Date: 1765
: a part of a river where the current is fast and the surface is usually broken by obstructions — usually used in plural but sing. or plural in constr.