Definition of arch:

part of speech: adjective

Chief of the first class.

part of speech: verb

To cover with an arch; to form an arch.

part of speech: noun

The circular part of any building; the hollow or concave part of a bridge or gateway.

part of speech: adjective

Waggish; mirthful.

Usage examples:

• This happened in the days of the Joseph Arch agitation, when the agricultural labourer's condition was being hotly discussed throughout the country. W.H. Hudson in "Afoot in England".

• The boy bent like an arch over Chamis and, seizing the case by the handle, began to transfer it to his side. Henryk Sienkiewicz in "In Desert and Wilderness".

• Besides, hadn't she recognized him and put out her arm to steady herself against the arch of the doorway? Charles Weathers Bump in "The Mermaid of Druid Lake and Other Stories".

• In the neighborhood of the new bridge, under the arch I recall seeing the eager face of my favorite boyhood school- teacher. Frederick A. Cook in "My Attainment of the Pole".