Definitions from Wiktionary ( )

▸ adjective:  Happening by chance.
▸ adjective:  Coming without regularity; occasional or incidental.
▸ adjective:  Employed irregularly.
▸ adjective:  Careless.
▸ adjective:  Happening or coming to pass without design.
▸ adjective:  (of behavior, usage, or milieu) Informal; relaxed.
▸ adjective:  (of clothing or utensils) Designed for informal or everyday use.
▸ noun:  (British, Australia, New Zealand) A worker who is only working for a company occasionally, not as its permanent employee.
▸ noun:  A soldier temporarily at a place of duty, usually en route to another place of duty.
▸ noun:  (UK, historical) A member of a group of football hooligans who wear expensive designer clothing to avoid police attention; see casual (subculture).
▸ noun:  One who receives relief for a night in a parish to which he does not belong; a vagrant.
▸ noun:  (video games, informal, derogatory) A player of casual games.
▸ noun:  (fandom slang) A person whose engagement with media is relaxed or superficial.
▸ noun:  (British, dated) A tramp.
▸ noun:  (in the plural) Shoes suitable for everyday use, as opposed to more formal footwear.

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