Meaning of ARC in English


I. ˈärk noun

Etymology: Middle English ark, from Anglo-French arc bow, from Latin arcus bow, arch, arc — more at arrow

Date: 14th century

1. : the apparent path described above and below the horizon by a celestial body (as the sun)


a. : something arched or curved

b. : a curved path

the arc of a fly ball

3. : a sustained luminous discharge of electricity across a gap in a circuit or between electrodes ; also : arc lamp

4. : a continuous portion (as of a circle or ellipse) of a curved line

5. : degree measurement on the circumference of a circle — used especially in the phrase of arc

11 minutes 3 seconds of arc

6. : a continuous progression or line of development

a story's dramatic arc

II. intransitive verb

( arced ˈärkt ; arc·ing ˈär-kiŋ)

Date: 1893

1. : to form an electric arc

2. : to follow an arc-shaped course

III. adjective

Etymology: arc sine arc or angle (corresponding to the) sine (of so many degrees)

Date: circa 1949

: inverse 2 — used with the trigonometric functions and hyperbolic functions

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.