Definitions from Wiktionary ( )

▸ noun:  (astronomy) That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.
▸ noun:  (geometry) A continuous part of the circumference of a circle (circular arc) or of another curve.
▸ noun:  A curve, in general.
▸ noun:  A band contained within parallel curves, or something of that shape.
▸ noun:  (electrics) A flow of current across an insulating medium; especially a hot, luminous discharge between either two electrodes or as lightning.
▸ noun:  (narratology) A story arc.
▸ noun:  (mathematics) A continuous mapping from a real interval (typically [0, 1]) into a space.
▸ noun:  (graph theory) A directed edge.
▸ noun:  (basketball, slang) The three-point line.
▸ noun:  (film) An arclight.
▸ verb:  (transitive, intransitive) To move following a curved path.
▸ verb:  (transitive) To shape into an arc; to hold in the form of an arc.
▸ verb:  (intransitive) To form an electrical arc.
▸ noun:  (nautical, military) The Colombian Navy (Armada de la República de Colombia).
▸ adjective:  (nautical, military, initialism) ship's prefix for warships of the navy of Colombia.
▸ noun:  (historical) A suggested location where the historical figure Joan of Arc, or her father, were from.
▸ noun:  (publishing) Acronym of advance reader's copy, a copy of a book given to a reviewer free in advance for review purposes.
▸ noun:  (pathology) Initialism of AIDS-related complex. [(medicine, pathology) A prodromal phase of infection with the human immunodeficiency virus.]
▸ noun:  (programming, uncountable) Acronym of Automatic Reference Counting.
▸ noun:  Initialism of American Red Cross.

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