any red eruption of the skin
"The doctor prescribed an ointment to soothe the rash that appeared on his son's arm after playing in the grass."
An area of reddened, irritated, and inflamed skin.
"The merchant's inventory included several bolts of rush fabric, a coarse material made from a blend of silk and worsted wool."
An inferior kind of silk, or mixture of silk and worsted.
In plain English: A rash is an irritated patch of skin that appears red, itchy, and bumpy after exposure to something irritating or infectious.
"Her arms broke out in an irritating rash after she wore the new sweater for too long."
Usage: When referring to a sudden outbreak on the skin, avoid using "rash" as an adjective unless you mean something acting hastily; instead, use adjectives like "sudden" or "rapid." Do not confuse this noun with the verb form of the same spelling, which describes moving quickly without thought.
To prepare with haste.
"He rashly pulled up his sleeve to reveal a fresh scratch on his arm."
To pull off or pluck violently.
In plain English: To rash means to do something quickly and without thinking about it first.
"He rashly decided to quit his job without looking for another one first."
Acting too quickly without considering the risks and consequences; not careful; hasty.
"The driver made a rash decision to overtake on the curve, nearly causing an accident."
In plain English: Rash means acting quickly without thinking about the consequences.
"He made a rash decision to quit his job without another offer lined up."
A surname.
"The local historian wrote an article about the Rash family's contribution to medieval architecture."
The word rash comes from Middle English and originally meant "hasty" or "headstrong." Its roots trace back to Old English words describing things that move rapidly or flash.