What is the meaning of the word "arch"?

Definitions:

  1. a curved masonry construction for spanning an opening and supporting the weight above it copy to clipboard noun
    • Arches were used to hold up ancient aqueducts. copy to clipboard
  2. a passageway under a curved masonry construction copy to clipboard noun
    • they built a triumphal arch to memorialize their victory copy to clipboard
  3. behavior or attitude characteristic of those who treat others with condescension copy to clipboard adjective
    • They spoke in an arch tone to anyone they thought was inferior to them. copy to clipboard
  4. to form an arch or curve copy to clipboard verb
    • The dancer's back arches. copy to clipboard

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