- The definition of rash is something done or said too fast.
An example of rash used as an adjective is a rash decision, a decision made without any consideration of the consequences.
- Rash is defined as a sudden outbreak of something.
- An example of rash is an allergic reaction to poison oak.
- An example of rash is a large number of complaints received from neighbors very quickly after a loud party started.
rash definition by Webster's New World
- too hasty or incautious in acting or speaking; reckless
- characterized by too great haste or recklessness: a rash act
- Obsolete bringing quick results
Origin: Middle English rasch, probably ; from Old English an unverified form ræsc, akin to Old Norse röskr, German rasch
- an eruption of spots on the skin, usually temporary
- a sudden appearance of a large or excessive number of instances: a rash of complaints
Origin: Middle French rasche ; from Vulgar Latin an unverified form rasica, a scraping: see rascal
rash definition by American Heritage Dictionary
adjective rash·er, rash·est
- Characterized by or resulting from ill-considered haste or boldness. See Synonyms at reckless.
- Archaic Quick in producing a strong or marked effect.
Origin: Middle English rasch, active, unrestrained, perhaps from Old English -raesc (in līgrǽsc, lightning) or from Middle Dutch or Middle Low German rasch, fast.
- rashˈly adverb
- rashˈness noun
- A skin eruption.
- An outbreak of many instances within a brief period: a rash of burglaries.
Origin: Possibly from obsolete French rache, a sore, from Old French rasche, scurf, from raschier, to scrape, scratch, from Vulgar Latin *rāsicāre, from Latin rāsus, past participle of rādere; see rēd- in Indo-European roots.
rash - Medical Definition