(astronomy) That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.

(transitive, intransitive) To move following a curved path. / (transitive) To shape into an arc; to hold in the form of an arc. / (intransitive) To form an electrical arc.

(mathematics) Used to form the names of inverse trigonometric functions, and the symbols for these functions.

(publishing) Acronym of advance reader's copy, a copy of a book given to a reviewer free in advance for review purposes. / (pathology) Initialism of AIDS-related complex.

Initialism of American Red Cross.

(nautical, military) The Colombian Navy (Armada de la República de Colombia).

(nautical, military, initialism) ship's prefix for warships of the navy of Colombia.

(historical) A suggested location where the historical figure Joan of Arc, or her father, were from.

plural of arc

Third-person singular simple present indicative form of arc