from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Occurring by chance. See Synonyms at chance.
  • adj. Occurring at irregular or infrequent intervals; occasional: casual employment at a factory; a casual correspondence with a former teacher.
  • adj. Unpremeditated; offhand: a casual remark.
  • adj. Being without ceremony or formality; relaxed: a casual evening with friends.
  • adj. Suited for everyday wear or use; informal.
  • adj. Not serious or thorough; superficial: a casual inspection.
  • adj. Showing little interest or concern; nonchalant: a casual disregard for cold weather.
  • adj. Lenient; permissive: a casual attitude toward drugs.
  • adj. Not close or intimate; passing: a casual acquaintance with avant-garde music.
  • n. One that serves or appears at irregular intervals, especially a temporary worker.
  • n. Casualwear: sent my casuals to the cleaners.
  • n. A soldier temporarily attached to a unit while awaiting permanent assignment.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Happening by chance.
  • adj. Coming without regularity; occasional or incidental.
  • adj. Employed irregularly
  • adj. Careless.
  • adj. Happening or coming to pass without design.
  • adj. Informal, relaxed.
  • adj. Designed for informal use.
  • n. A worker who is only working for a company occasionally, not as its permanent employee.
  • n. A soldier temporarily at a place of duty, usually en route to another place of duty.
  • n. A member of a group of football hooligans who wear expensive designer clothing to avoid police attention; see Casual (subculture).
  • n. One who receives relief for a night in a parish to which he does not belong; a vagrant.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Happening or coming to pass without design, and without being foreseen or expected; accidental; fortuitous; coming by chance.
  • adj. Coming without regularity; occasional; incidental.
  • n. One who receives relief for a night in a parish to which he does not belong; a vagrant.

from The Century Dictionary and Cyclopedia

  • Happening or coming to pass without (apparent) cause, without design on the part of the agent, in an unaccountable manner, or as a mere coincidence or accident; coming by chance; accidental; fortuitous; indeterminate: as, a casual encounter.
  • Occasional; coming at uncertain times, or without regularity, in distinction from stated or regular; incidental: as, casual expenses.
  • n. A person who receives relief and shelter for one night at the most in a workhouse or police-station, or who receives treatment in a hospital for an accidental injury.
  • n. A laborer or an artisan employed only irregularly.

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

  • adj. occurring or appearing or singled out by chance
  • adj. natural and unstudied
  • adj. hasty and without attention to detail; not thorough
  • adj. not showing effort or strain
  • adj. characterized by a feeling of irresponsibility
  • adj. occurring from time to time
  • adj. without or seeming to be without plan or method; offhand
  • adj. appropriate for ordinary or routine occasions
  • adj. marked by blithe unconcern


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English casuel, from Old French, from Latin cāsuālis, from cāsus, event; see case1.

from Wiktionary, Creative Commons Attribution/Share-Alike License

(14th century) from Late Latin cāsuālis ("happening by chance"), from Latin cāsus ("event"), from cadere ("to fall").


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  • 19215 is the casual number par excellence. See bugs.

    December 24, 2008