What is the meaning of arch?

noun

• A curved shape in the vertical plane that spans an opening.
• A curved bony structure supporting or enclosing organs (especially the inner sides of the feet. )
• A passageway under a curved masonry construction.
  • usage: "they built a triumphal arch to memorialize their victory"
  • synonyms: archway
• Architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it. (

verb

• Form an arch or curve.
  • usage: "her back arches"; "her hips curve nicely"
  • synonyms: curve, arc

adjective

• Used of behavior or attitude. ( characteristic of those who treat others with condescension)
  • synonyms: condescending, patronizing, patronising
• Expert in skulduggery.
  • usage: "an arch criminal"
• Naughtily or annoyingly playful.
  • usage: "teasing and worrying with impish laughter"; "a wicked prank"
  • synonyms: impish, implike, mischievous, pixilated, prankish, puckish, wicked