from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Heedless or careless.
- adj. Headstrong; rash.
- adj. Indifferent to or disregardful of consequences: a reckless driver.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Careless or heedless; headstrong or rash.
- adj. Indifferent to danger or the consequences.
from the GNU version of the Collaborative International Dictionary of English
- adj. Inattentive to duty; careless; neglectful; indifferent.
- adj. Rashly negligent; utterly careless or heedless.
from The Century Dictionary and Cyclopedia
- Not recking; careless; heedless; inattentive: in a mild sense.
- Not recking of consequences; desperately heedless, as from folly, passion, or perversity; impetuously or rashly adventurous.
- Synonyms Enterprising, Rash, etc. (see adventurous), incautious, unwary, unconcerned, indifferent, thoughtless. See list under rash.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. marked by defiant disregard for danger or consequences
- adj. characterized by careless unconcern
Middle English reckeles, from Old English rēcelēas; see reg- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English rekles, reckeles, from Old English rēcelēas ("reckless, careless, negligent"), equivalent to reck + -less. Cognate with Dutch roekeloos ("reckless"), German ruchlos ("careless, notorious"). (Wiktionary)