rash

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A visible lesion or group of lesions on the skin, caused by any of numerous factors including infectious agents, drugs, and allergies.
• noun An outbreak of many instances within a brief period.
• adjective Resulting from or acting with ill-considered haste or boldness. synonym: reckless.

from The Century Dictionary.

• To put together hurriedly; prepare with haste.
• To publish imprudently; blab.
• To cook too rapidly; burn from haste: as, the beef has been rashed in the roasting.
• Quick; sudden; hasty.
• Hasty in council or action; precipitate; headstrong; impetuous; venturesome: as, a rash statesman or minister; a rash commander.
• Marked by or manifesting inconsiderate haste in speech or action; resulting from temerity or recklessness: as, rash words; rash measures.
• Requiring haste; urgent.
• Synonyms and Enterprising, Foolhardy, etc. (see adventurous), precipitate, hasty, headlong, inconsiderate, careless, heedless. See list under reckless.
• To tear or slash violently; lacerate; rend; hack; hew; slice.
• So ripe or dry as to break or fall readily, as corn from dry straw in handling.
• noun Corn in the straw, so dry as to fall out with handling.
• noun A kind of inferior manufacture of silk or of silk and stuff.
• noun A more or less extensive eruption on the skin.
• noun An obsolete or dialectal form of rush.
• noun A crisp rustle; a crackle.
• Quick, brisk, hot; causing too quick a result: as, a rash fire.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) A fine eruption or efflorescence on the body, with little or no elevation.
• noun See in the Vocabulary.
• noun See Urticaria.
• noun See Roseola.
• noun See Red-gum.
• noun obsolete An inferior kind of silk, or mixture of silk and worsted.
• transitive verb obsolete To prepare with haste.
• transitive verb obsolete To pull off or pluck violently.
• transitive verb obsolete To slash; to hack; to cut; to slice.
• adjective obsolete Sudden in action; quick; hasty.
• adjective obsolete Requiring sudden action; pressing; urgent.
• adjective Esp., overhasty in counsel or action; precipitate; resolving or entering on a project or measure without due deliberation and caution; opposed to prudent; said of persons.
• adjective Uttered or undertaken with too much haste or too little reflection
• adjective Prov. Eng. So dry as to fall out of the ear with handling, as corn.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective hasty, not careful or considered.
• noun medicine An area of reddened, irritated, and inflamed skin.
• noun A surge in problems; a spate, string or trend
• verb obsolete To prepare with haste.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective marked by defiant disregard for danger or consequences
• noun a series of unexpected and unpleasant occurrences
• noun any red eruption of the skin
• adjective imprudently incurring risk