CASUAL

casual. Casual, a. accidental, not certain, uncertain

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Cas″u‐al (?), a. [[OE. casuel, F. casuel, fr. L. casualis, fr. casus fall, accident, fr. cadere to fall. See Case.]] 1. 1. Happening or coming to pass without design, and without being foreseen or expected; accidental; fortuitous; coming by chance.
Casual breaks, in the general system. W. Irving. 2. 2. Coming without regularity; occasional; incidental; as, casual expenses.
A constant habit, rather than a casual gesture. Hawthorne. Syn. — Accidental; fortutious; incidental; occasional; contingent; unforeseen. See Accidental.