Real Dictionary

-arch in American English
ruler
suffix: a combining form meaning “chief, leader, ruler,” used in the formation of compound words

-arch in British English
combining form in countable noun: leader; ruler; chief

arch
An arch look is mysterious and mischievous.
countable noun: An arch is a curved line or movement.
countable noun: An arch is a structure that is curved at the top and is supported on either side by a pillar, post, or wall.
countable noun: The arch of your foot is the curved section at the bottom in the middle.
verb: If something arches in a particular direction, it makes a curved line or movement.
verb: If you arch a part of your body such as your back or if it arches, you bend it so that it forms a curve.
verb: If you arch your eyebrows or if they arch, you move them upwards as a way of showing surprise or disapproval.

Arch in American English
archaic

arch in American English 1
a curved structure, as of masonry, that supports the weight of material over an open space, as in a bridge, doorway, etc.
noun: a curved masonry construction for spanning an opening, consisting of a number of wedgelike stones, bricks, or the like, set with the narrower side toward the opening in such a way that forces on the arch are transmitted as vertical or oblique stresses on

arch in American English 2
main; chief; principal
adjective: playfully roguish or mischievous
noun: a person who is preeminent; a chief

arch in British English 1
noun: a curved structure, normally in the vertical plane, that spans an opening

arch in British English 2
adjective: chief; principal; leading

arch-
combining form: Arch- combines with nouns referring to people to form new nouns that refer to people who are extreme examples of something. For example, your arch-rival is the rival you most want to beat.

arch- in American English
main, chief, principal

arch- in American English 1
combining form: a combining form that represents the outcome of archi- in words borrowed through Latin from Greek in the Old English period; it subsequently became a productive form added to nouns of any origin, which thus denote individuals or institutions directing or

arch- in American English 2
combining form

arch- in British English
combining form: chief; principal; of highest rank

arch. in American English
abbreviation: archaic
abbreviation: Archbishop

arch. in British English
abbreviation for: archaic